QUETTA: At least one police man was killed on Thursday when suspected militants attacked a polio team in Balochistan's Loralai district, police said.

Shah Muhammad, a police official told Dawn.com that unknown armed men on motorcycle opened fire on a polio team in Nasarabad area of Loralai.

He said one policeman guarding the polio team workers was killed on the spot.

"The militants sped away on their motorcycle after the attack", Muhammad said.

The polio team was engaged in an anti-polio drive in Loralai bazar when it came under attack by the suspected militants.

Moreover, police and levies personnel reached the spot and started an investigation of the incident.

There was no immediate claim of responsibility for the attack.

Polio teams in Quetta, Pishin and other parts of Balochistan had been repeatedly attacked by militants in the past.

Also, attacks on part of militants have affected the anti polio drive in Balochistan.

In 2012, 73 cases of polio virus were reported from different parts of the province. However, since January 2013, no polio case was reported from any part of Balochistan.