OSLO, Norway - Police destroyed a cache of explosives on a farm owned by the suspect in last week's bombing and youth camp shooting on Wednesday as Norway's intelligence chief cast increasing doubt on Anders Behring Breivik's claim that he was part of a right-wing network in Europe.
Meanwhile, rail network officials said a suspicious suitcase was found in at Oslo's central train station, prompting the partial evacuation of the station as Norway's capital remains on guard following the massacre on Friday.
Officials said the suitcase was found in the area where buses depart for Oslo's airport. Police sealed off the area and examined the abandoned luggage, but later said there was no connection to the Friday attack which Breivik has admitted carrying out.
"Nothing was found that was of interest to the police," Police chief superintendent Tore Barstad told reporters, according to the Reuters news agency.
The first Cabinet ministers were to return to their offices Wednesday after a car bomb exploded in the government district of the Norwegian capital.
Breivik, a 32-year-old Norwegian, has confessed to the attacks, according to police and his lawyer, but pleaded not guilty.
On Wednesday, police detonated an unknown quantity of explosives found on a farm owned by Breivik north of Oslo in a controlled blast.
CBS News partner network Sky News reports that Breivik posed for years as a farmer in order to purchase large amounts of synthetic fertilizer, some of which he obtained online from a Polish company.
Norway's intelligence chief told the BBC on Wednesday that investigators have found no evidence to support Breivik's claims of contact with other extremist individuals or groups in Britain or anywhere else.
"We don't have indications that he has been part of a broader movement or that he has been in connection with other cells or that there are other cells," Janne Kristiansen told the BBC.
She cautioned that the investigation was still underway and that connections to other groups or individuals could not be ruled out.
In a voluminous online manifesto posted the morning before the attack Breivik expressed an admiration for right-wing extremist groups in the U.S. and Europe.
"We are in close contact with our sister services in Europe, America and elsewhere," said Kristiansen.