A suicide attack on a school bus in southwestern Pakistan killed three students of a military-run school on Wednesday, officials said, in the latest attack that underscores the deteriorating security situation in the region.

The vehicle was carrying dozens of children to a military-run school in the southwestern Balochistan Province, a region long roiled by rebel activity.

At least four children were killed on Wednesday (May 21) and over 30 wounded in a suspected suicide bombing that targeted a bus carrying students from a military run school in southwestern Pakistan, officials said.