OSLO, July 27, 2011 (AFP) - Oslo's central train station was partially evacuated and a bomb disposal team deployed on Wednesday morning because of a suspicious item of baggage, officials told AFP.

"A bomb disposal team is in the station. For the time being, we haven't found anything suspicious," an unnamed policeman told journalists at the scene, adding that the station could be given the all clear in half an hour.

The policeman said a man was seen leaving "in a strange way" a bus parked in front of the station and that a suitcase was found "strangely" in the aisle aboard the bus.

A remote control robot had reached the bag but initial information suggests that it contains nothing suspicious, the policeman said.

A railway official earlier identified the bus as the shuttle temporarily replacing the train service to Oslo airport.

Police are looking for a man aged 25-30 wearing black with white headgear, TV2 television channel said.

An AFP journalist said police had sealed the station entrance, with around 10 police vehicles and three fire engines on the scene.

Around 200 people were waiting with their bags outside the station.

Norway is on the alert after twin bombing and shooting attacks on Friday left 76 people dead, the worst bloodshed in the country since WWII.