In Karachi, unknown assailants killed a provincial leader from the Muttahida Majlis-e-Amal Islamic opposition alliance, police said. Aslam Mujahid, deputy chief of Jamaat-e-Islami in Karachi, was kidnapped early in the day and his bullet-riddled body was later found in an abandoned car in the east of the city. Mairaj-ul-Huda, head of Jamaat-e-Islami's Karachi wing, said Mujahid was kidnapped after the funeral of a party member. "Two hours later we received a phone call from the area Nazim that his body has been in a car."Huda said the party suspected the Muttahida Qaumi Movement, a rival regional party that is a member of the governing national coalition, was behind the killing. "The city has been put on high alert," Rauf Siddiqui, home minister for the southern province of Sindh, of which Karachi is the capital, told Reuters. "We have ordered all police stations to remain on high alert and have asked the police and rangers to increase patrolling. The blast, and the killing of Aslam Mujahid earlier in the day show that all these activities are planned," he said, adding that a reward of 2.5 million rupees ($42,000) had been offered for information about Mujahid's assassins. More than 100 people have been killed in tit-for-tat attacks by majority Sunni and Shi'ite militants in the past year. Most of the attacks have been blamed on Sunni militant groups with links to Osama bin Laden's al Qaeda network which have been angered by Pakistan's support for Washington's war on terrorism.