Around five unidentified men, riding motorbikes, hurled a hand grenade at the main gate of Mobina Town police station in Gulshan-e-Iqbal Town and within two hours of the attack two more hand grenades were lobbed at a bridge in Liaquatabad Town and a private school in North Nazimabad area, Express Tribune reported.
A constable, who was on duty at the police station, was injured in the attack in which several vehicles were also damaged, police said.
The explosions caused fear and panic among residents.
A heavy contingent of police and Rangers reached the sites of the attack.
Chief Minister Qaim Ali Shah has ordered a probe into the incident.
The attacks come days after a check-post of the Pakistan Rangers (Sindh) was damaged after a home-made cracker exploded near it in the city on Sunday.
