Peshawar, Jan 31 (Agencies): At least six people, including a Deputy Superintendent of Police, were killed and 19 others injured when two police vehicles were targeted by a suicide bomber and a roadside bomb in this northwestern Pakistani city on Monday.

In the first attack, a suicide attacker struck DSP Abdur Rashid Khan's vehicle at an intersection on the busy Ring Road this morning.

The police officer, two bodyguards, a driver and another person in a car parked at the site of the blast were killed, officials said.

Officials at the Lady Reading Hospital said they had received 15 injured people.

The bomber was waiting at the intersection. The DSP was on his way to office when the bomber struck, police said.

DSP Khan had survived two attempts on his life in the Gulbahar area of Peshawar last year.

A short while later, another police vehicle—which was on a routine patrol was targeted with a roadside improvised explosive device at Tajabad area along the Ring Road.

A constable was killed and four policemen were injured by the powerful blast.

Security forces cordoned off the area and launched a search for the attackers.

Additional Inspector General Shafqat Malik of the bomb disposal squad said police had found the head and body parts of the suicide bomber as well as the triggering mechanism of the suicide vest.

About seven kilograms of high explosives were used in the suicide attack, he said.

Khyber-Pakhtunkhwa Senior Minister Bashir Bilour, a senior leader of the Awami National Party that rules the province, said the government's drive against militants will continue despite such attacks.

"We are ready to die, we are prepared to sacrifice our lives to defend Pakistan," he told the media at the site of the suicide attack.

Bilour ruled out the possibility of holding talks with militants who did not lay down their arms.

Provincial Information Minister Mian Iftikhar condemned the attacks and described them as acts of cowardice.