At least 42 are dead following a militant attack on Data Darbar, a Muslim Sufi shrine in Lahore, the burial site of the Persian Sufi saint, Abul Hassan Ali Hajvery. Sufis and Shiites have been frequent targets of Sunni militant violence in Afghanistan and Pakistan. Deobandi Sunnis, among whose ranks are the Taliban, regard praying in shrines as apostasy.
Story at BBC
Additional Analysis and Background from Professor Juan Cole
Major Militant Attacks in Pakistan During the Past Year
28 May 2010 – 93 people killed in attacks on two Ahmadi mosques in Lahore
19 Apr 2010 – At least 23 die in suicide bombing at market in Peshawar
1 Jan 2010 – A bomb at a volleyball match kills about 100
28 Oct 2009 – At least 120 die in car bomb attack on packed market in Peshawar
15 Oct 2009 – About 40 die in a series of gun and bomb attacks
9 Oct 2009 – At least 50 die in Peshawar suicide blast
Source: BBC, http://news.bbc.co.uk/2/hi/world/south_asia/10486925.stm, July 2, 2010