It was another sad day in Maiduguri, the Borno State capital Friday as a series of bomb explosions rocked parts of the town resulting in the death of seven persons.

One of the explosions was at the Borno State Police headquarters where a suicide bomber struck killing six persons killed, including two policemen and four civilians.

A police source said the suicide car bomber believed to be a member of the dreaded Boko Haram sect attempted to force his way into the state headquarters through the main gate with a car laden with explosive devices.

The source said the bomb went off while policemen on guard at the gate prevented the bomber from entering.

He, however, said he cannot give further details as "efforts are going on to clear the debris and rescue the affected persons."

Friday's attack is the second time a suicide bomber would ram into the police headquarters. The first attempt was made last year August.

During Friday's attack though, the bomber was gunned down by the policemen at the gate but the bomb still went off.

In the second explosion, which happened earlier in the day between 7:00 am and 8:15 am, an unknown bomber detonated his device around 'Gidan Dambe' area of the metropolis.

According to witnesses, he was trying to plant an Improvised Explosive Device, IED, which exploded killing him in the process.

It was gathered that movement of some suspicious persons had started at Gidan Dambe on Thursday night but that the people of the area kept mute for fear of being killed.

According to the source, they saw men carrying weapons around the area but they thought that they might be security operative in plain clothes.

The town had been experiencing clashes between sect members and security operatives in recent time.

The sources, however, said they noticed some awkward behaviour in the people and suspected them to be members of dreaded Boko Haram sect.

"Between 7:00 am and 8:15 am, we heard a large sound of the blast, immediately we knew without being told that it was bomb. I opened my window and looked around the streets and I saw police men running towards the place where the explosion occurred. It was very powerful, just don't come around our area, it is very bad," he warned.

Joint Task Force official, who later spoke to newsmen, said that the IED was concealed in a bag and kept under a public shed and exploded while the victim was trying to plant it.

"There was an explosion in an area of Maiduguri this morning and our men immediately deployed to the area," Col, Victor Ebhaleme, the Field Operations Officer of the task force told newsmen.

"They found a man we believe to be a member of Boko Haram, dismembered by the explosion. Preliminary investigation has shown that he was killed when he was trying to plant the device."