QUETTA: At least three security personnel, a civilian and a minor were injured in a suicide blast at the entrance of a military cantonment compound in Balochistan's Zhob district on Friday, officials said.

A suicide bomber rammed an explosive-laden vehicle into the gate of the compound, said Deputy Commissioner Nazar Muhammad Khetran, adding that the "intensity of the blast rocked the entire city."

He said police and other law enforcers responded swiftly, and shifted the injured to a military-run hospital.

The outlawed Tehreek-i-Taliban Pakistan (TTP) Masood group claimed responsibility for the attack.

A heavy contingent of security forces' personnel reached the blast site and cordoned off the area.

Zhob is considered to be one of the sensitive districts of Balochistan since it borders the country's volatile tribal belt. It is also considered to be a transit point for militants sneaking in from neighbouring Afghanistan and the tribal belt of Pakistan.