At least four people including three Chinese nationals have been killed in an explosion on the premises of Karachi University.
Rescue and law enforcement agencies were rushed to the site following the incident.
The actual cause of the explosion is yet to be ascertained, say the police.
Some reports claimed that the cause of the explosion was a gas cylinder, however, the claims were not substantiated by authorities.
Others claimed that it was a suicide attack.
Sindh Chief Minister Murad Ali Shah while taking notice of the incident, directed the East deputy commissioner (DC) and SP to reach site of the blast and launch an investigation.
He directed the authorities to provide the best medical care to the injured and sought a detailed report of the blast from the Karachi commissioner.