Gunmen have killed an anti-terrorism court judge and his family as they travelled from the Swat Valley in north-west Pakistan to the capital Islamabad.
No-one claimed responsibility for the shooting, which also seriously injured two of Judge Aftab Ahmed Afridi's bodyguards.
Pakistan's anti-terrorism courts were established to hear cases ranging from terrorist financing to the prosecution of perpetrators of insurgent attacks.
Critics say Pakistan's sweeping anti-terrorism laws have also been used to silence critics of the country's powerful military.
Afridi, his wife and two children - including a two-year-old son - were killed in the attack.
Afridi had been assigned to the anti-terrorism courts in Swat two months earlier.
Swat was once a Taliban-controlled area and is where education activist Malala Yousafzai was shot by the Taliban for advocating for girls' education.
Pakistan's military drove the Taliban from the area in 2009.