From BBC News.

At least 31 people have been killed in an explosion at a Shia mosque during Friday prayers in the Pakistani capital Islamabad, officials have said.

The blast at the mosque in the Tarlai area of the city prompted an emergency to be declared at three hospitals in the city.

The cause of the blast was not immediately clear, however reports suggest it was carried out by a suicide bomber.

Pakistan’s president said "targeting innocent civilians is a crime against humanity".

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