The leader of a Sunni party in Pakistan was shot dead on Monday, police and party officials said.
Ali Sher Haideri, chief of the Millat-e-Islamia Pakistan, was returning home in Khairpur, 240 km (150 miles) northeast of the southern city of Karachi, after a public gathering when gunmen ambushed his car, police said.
"He was killed along with one of his companions who was driving the car, while one of the six attackers was also killed when his guards returned fire," Pir Muhammad Shah, chief of police in Khairpur, told Reuters by telephone.
Millat-e-Islamia, or Nation of Islam, was formed in 2002 by members of the Sipah-e-Sahaba Pakistan (SSP), a Sunni Muslim organisation that was for years involved in tit-for-tat killings with Shi'ite militants, according to Reuters news agency.
The government banned the SSP along with several other groups in 2002.
The Millat-e-Islamia was officially banned in 2003 though it has continued to operate.