At least seven people have been killed in a suicide attack at a mosque in cantonment area of the city, report said here on Friday. The incident occurred in Jamia Masjid Supply Depot where near 100 devotees were present to offer Jumma prayer when a suicide bomber rammed his explosive-laden vehicle into the mosque. The explosion resulted in a big crater at the site, says the news report. Paramedics and police personnel arrived at the scene soon after the incident and rushed the injured to the hospitals.