An explosion has killed 10 people at a Pakistani hospital where victims of an earlier bombing were being treated, police and doctors say.
At least 12 people were killed in the first attack on a bus of Shia Muslims heading to a religious festival.
About 50 people were injured in the attack, and were taken to Jinnah hospital in Karachi.
About an hour later there was a large blast just outside the emergency ward of the hospital, police said.
Shia Muslims are marking the end of the Arbaeen religious festival, with Friday being the final and most important day of 40 days of mourning for the Prophet Muhammad's grandson.
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