The intelligence agencies' officials have taken the accused of a suicide blast on the motorway in Pakistan's east under their custody and have kicked off investigation into the incident, according to local TV reports Sunday.

The private Geo TV quoted police sources as saying that the accused was aged between 22 to 23 years and could not speak the Urdu language fluently as he was a Pushto speaking person, besides having light moustaches and wearing white Shalwar Kameez.

Late Saturday night, a suicide bomber exploded himself near an interchange on the motorway linking the Pakistani capital of Islamabad and the eastern city of Lahore, killing a motorway police official.

According to motorway police sources, motorway police officials, intercepting a suspected vehicle, requested it to stop near the Islamabad-Lahore motorway interchange, namely Lillah, but the driver, on the vehicle, blew himself up with explosives.

Another suspected person was arrested near the blast scene and was taken to unidentified location for investigation, sources said.

The motorway police were put on high alert after receiving information that an explosives-laden car would travel on the motorway.