By Ellen Wulfhorst, Daniel Wallis and Edward McAllister
FERGUSON, Mo. (Reuters) - Police arrested scores of people in cities around the United States who were protesting a Missouri grand jury's decision not to indict a white police officer for killing an unarmed black teenager, authorities said on Wednesday, but the town where the shooting took place was a little calmer.
Protests in Boston, New York, Los Angeles, Atlanta and elsewhere came on a second night of street violence in the St. Louis suburb of Ferguson, Missouri, where policeman Darren Wilson shot to death 18-year-old Michael Brown on Aug. 9. The shooting has highlighted the often-tense nature of U.S. race relations and the strains between black communities and police.
There was less violence on the streets of Ferguson than on the previous night, as the deployment of some 2,000 National Guard troops to the area helped police prevent the rioting, looting and arson that erupted on Monday night.
Police made 45 arrests in Ferguson from Tuesday night into early Wednesday for offenses ranging from a couple of dozen misdemeanors for unlawful assembly to five for assaulting law enforcement officers. Thirty of the arrested listed Missouri addresses and one was from Berlin, Germany, police said.
In other cities, demonstrators marched through city streets, sometimes blocking traffic and scuffling with police. Police in Boston said on Wednesday 45 people were arrested in protests overnight that drew more than a thousand demonstrators.
Wilson said he was acting in self-defense and his conscience was clear. He told ABC News that there was nothing he could have done differently that would have prevented Brown's death. But the parents of the slain teenager said they did not accept the officer's version of the events.
"I don't believe a word of it," Brown's mother Lesley McSpadden told "CBS This Morning" on Wednesday.
Tensions between police and black Americans have simmered for decades, with many blacks feeling the U.S. legal system and law enforcement authorities do not treat them fairly. For example, blacks account for disproportionate percentages of the overall prison population and of the inmates sentenced to death.
The crowds in Ferguson were smaller and more controlled than on Monday, when about a dozen businesses were torched and others were looted amid rock-throwing and sporadic gunfire from protesters and volleys of tear gas fired by police. More than 60 people were arrested then.
"Generally, it was a much better night," St. Louis County Police Chief Jon Belmar told reporters early on Wednesday, adding there was very little arson or gunfire, and that lawlessness was confined to a relatively small group.
In New York, where police used pepper spray to control the crowd after protesters tried to block the Lincoln Tunnel and Triborough Bridge, 10 demonstrators were arrested, police said.
Protesters in Los Angeles threw water bottles and other objects at officers outside city police headquarters and later obstructed both sides of a downtown freeway with makeshift roadblocks and debris, authorities said.
Atlanta police made 24 arrests Tuesday night, including some in a group of about 150 people who broke away from an otherwise peaceful protest of more than 1,000 people and blocked traffic on a downtown freeway, Mayor Kasim Reed said on Wednesday.
Reed said protesters also threw rocks at police cars and damaged property, including a bank and a taxi cab. No officers were hurt, the mayor said, adding the city police force used a strategy of "available force with a light touch."
"I'm not going to have the city of Atlanta look like it's under martial law," he said.
Two Milwaukee police officers suffered minor injuries on Tuesday when they tried to stop protesters from entering the BMO Harris Bradley Center, where the Milwaukee Bucks were playing an NBA basketball game, police said. No arrests were made.
In Oakland, California, protesters set rubbish on fire in the middle of a street and swept onto a downtown stretch of Interstate 980, briefly halting traffic.
Four people were arrested for blocking a roadway in Denver, where police said several hundred people turned out for a protest march.
As the first black president, Barack Obama has come under pressure from some in the black community to speak out more on racial issues and to assume a more visible role regarding the Ferguson shooting.
Obama remained cautious in his comments in the immediate aftermath of the Ferguson shooting, but has been more expansive in recent days including remarks at the White House after the grand jury's decision.
He said deep distrust exists between police and minorities in part due to America's "legacy of racial discrimination," adding that "communities of color aren't just making these problems up."
Obama's Justice Department continues to consider bringing federal civil rights charges against the officer.
(Additional reporting by Susan Heavey in Washington, Brendan O'Brien in Milwaukee, Alex Dobuzinskis in Los Angeles, Carey Gillam in Kansas City, David Bailey in Minneapolis, Fiona Ortiz and Mary Wisniewski in Chicago, Jonathan Kaminsky in New Orleans, and Laila Kearney and Letitia Stein in New York, Eric M. Johnson in Seattle, Colleen Jenkins in North Carolina.; Writing by Frank McGurty; Editing by Will Dunham)