Islamabad, Sept. 3 -- At least 13 people were killed and 31 others injured when a blast went off in Pakistan's southwest Balochistan province, health and police officials said here on Wednesday.

Confirming the casualties, Waseem Baig, media coordinator of the provincial health ministry, told media that the death toll might further rise as several among the injured are in critical condition.

The explosion occurred near a political gathering in the Shahwani Stadium area of the provincial capital city of Quetta, police sources told media.

According to the government officials, the explosion appeared to be a suicide bombing, saying an investigation has been launched into the incident to ascertain the exact nature of the cause and apprehend t...