A Rangers official was martyred and 10 others, including two Rangers personnel, were injured in an explosion in Karachi's Orangi Town on Monday evening, police said.

West Senior Superintendent of Police (SSP) Suhai Aziz said the attack was apparently directed at the Rangers personnel who were passing through the area in a vehicle when the bomb — fitted in a parked motorcycle — went off.

As a result, three Rangers personnel and seven other people were injured, she added. They were shifted to different hospitals in the city. One Rangers official succumbed to his injuries, the SSP said.

CTD DIG Omar Shahid Hamid said the banned Baloch Liberation Army (BLA) had claimed responsibility for the attack through their social media account.

Mominabad SHO Gul Mohammed Awan also confirmed that the bomb was planted in a parked motorcycle in Orangi Town-5.

One official of the Karachi Traffic Police and a constable of the Anti-Vehicle Lifting Cell who were passing through the area when the explosion took place were also among the injured, he added.

A team of the bomb disposal squad was called to the area.

Investigators were trying to obtain CCTV footage from the site of the blast as the police's Counter-Terrorism Department launched an investigation.

Sindh Inspector General of Police Mushtaq Ahmed Mahar took notice of the "terror attack on Rangers mobile" on a main road and sought a detailed report from the West SSP, a police spokesperson said.

Sindh Governor Imran Ismail termed the blast a "matter of great concern". In a tweet, he said an immediate inquiry into the attack was "essential".

He also directed that medical aid be provided to the injured persons.

"We realise [the Rangers'] sacrifices for restoration of peace in Karachi," he said.

In December of last year, four people, including two paramilitary soldiers, were wounded in a cracker attack on a moving Rangers mobile near the Sheikh Zayed Islamic Centre on University Road.

An outlawed militant organisation had claimed responsibility for the attack.