The blast at Civil Hospital took place shortly after unidentified gunmen shot dead president of Balochistan Bar Association (BA) advocate Bilal Anwar Kasi in the provincial capital, following which lawyers had brought his body to the hospital.
A loud explosion was heard as lawyers and journalists had gathered at the emergency department where Kasi’s body was brought for autopsy.
Police said unidentified men also opened fire after the blast.
No one immediately claimed responsibility for the blast, which struck at the gates of the building housing the emergency ward, on the hospital grounds.
A Pakistani news channel reported that one of its cameramen was also killed in the blast.
Pakistan’s prime minister has denounced the attack.
He instructed local authorities in Baluchistan province, where Quetta is the capital, to maintain utmost vigilance and beef up security.