ISLAMABAD, Pakistan (CNN) -- A suicide bombing at a mosque in Pakistan has killed at least 20 people, according to local police.
The attack occurred about 12:30 p.m. Sunday (3:30 a.m. ET) local time while the worshippers were attending an annual event at the mosque in Punjab province. The bomber detonated his explosives at the front gate of the mosque, police say.
Punjab province has seen a spike in sectarian violence in recent months, including attacks on Shia funeral processions. Checkpoints along NATO supply lines going through the area have also come under attack.
Sri Lankan cricket players were attacked in March on the way to a match against Pakistan in Lahore. Last week, militants attacked a police training academy on the outskirts of Lahore.
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