article_snippet.sent: Al-Shabaab attacks have notched up since 2008.
article_snippet.sent: In December, Al-Shabaab militants carried out the same macabre division of captives by religion at a rock quarry not far from Somalia's southern border.
article_snippet.sent: Al-Shabaab militants shot Red Cross Workers dead, and spared Al-Shabaab militants Muslim colleagues.
article_snippet.sent: It was eye-for-an-eye retaliation, Al-Shabaab militants said, for raids
article_snippet.sent: Kenyan security forces carried out on mosques intended to weed out extremists.
article_snippet.sent: In Al-Shabaab gunmen claim of responsibility, Al-Shabaab said the dead were Christians, and Al-Shabaab killing was retaliation mosque raids by Kenyans.
article_snippet.sent: In July, Al-Shabaab gunmen opened fire on the Lamu coast, a popular tourist region, and at a police station in a neighboring county.  
article_snippet.sent: Al-Shabaab gunmen killed 22 people.