At least 31 people were killed and 169 wounded in a suicide bombing at a Shi'ite mosque in Pakistan's capital, Islamabad, on Friday, a government official said.

"The death toll in the blast has risen. A total of 31 people have lost their lives. The number of wounded brought to hospitals have risen to 169," Islamabad's deputy commissioner Irfan Memon said.

 This is a developing story.