"They have burnt the Salvation Army church and we are now trying to repulse them with tear gas,"AFP quotes a senior police officer as saying.Mr Omar and three other people were shot dead in Mombasa as they drove home on Thursday night after preaching.It comes two weeks after the deadly attack on a Nairobi shopping centre.Somali Islamist group al-Shabab,which is part of al-Qaeda,said its militants stormed the Westgate mall in the capital in retaliation for Kenya's military involvement in Somalia.Mr Omar's killing is similar to that of Aboud Rogo Mohammed last year,which sparked days of rioting by Muslims in Mombasa.Mr Rogo was alleged to have links with al Shabab and some Muslims accused the Kenyan security forces of killing him -an allegation they strongly denied.
