A gunman burst into a day spa where his estranged wife worked in the midwestern US state of Wisconsin and opened fire Sunday, killing three people and injuring four others, police said.
Gunmen massacred at least 26 people in a student housing area of northeast Nigeria on Tuesday, calling victims out by name before shooting them or slitting their throats.
India's Supreme Court on Wednesday confirmed the death sentence handed down to Mohammed Kasab, the lone surviving gunman from the 2008 Mumbai attacks in which 166 people were killed.
Norway gunman Anders Behring Breivik faces either a long stay behind bars or in a psychiatric ward, with his theoretical chance of release depending on the verdict handed down on Friday.
The man suspected of gunning down 12 people at a screening of the new Batman movie last month is mentally ill, his defense lawyer said Thursday, seeking more time to assess his health.
Police on Monday probed the white power ties of the former US soldier who gunned down six people at a Sikh temple in Wisconsin, while the close-knit Indian-American community mourned its dead.
A gunman attacked worshippers on Sunday at a suburban Sikh temple in the midwestern United States, killing at least six people before he was himself shot dead by police.
Alleged Colorado cinema gunman James Holmes is due to make his second court appearance on Monday as he is charged with committing one of America's worst ever mass shootings.