A car bomb exploded Wednesday in a heavily guarded neighborhood of an eastern Pakistani city where many government officials live, leaving one woman dead and four people wounded, police said. The blast in Lahore, which borders India, came amid tensions between the nuclear-armed neighbors over the deadly attacks in Mumbai last month, which Indian authorities have blamed on Pakistan-based militants. It was not immediately clear if the attacks were linked. The explosives were planted in a mini-truck parked in the Mazang Chungi area of the city, said senior police official Umer Virk. The blast killed a woman and wounded four other members of a Christian family who were driving to a Christmas-related function, Virk said. The vehicle that exploded bore an official government registration plate. It was obliterated, with pieces scattered for 200 yards (meters), while the wall of a nearby house collapsed, police said.