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The sinkhole in Drammen
Two trees disappeared one and a half meter into the ground as a sinkhole suddenly appeared outside the entrance to the college BI at Greenland in Drammen Thursday night.The sinkhole outside the building Papirbredden, which includes the economic college BI and the college of Buskerud and Vestfold, was five times five meters.

The depth is estimated to be one and a half meters as two trees at the site fell one and a half meters into the ground.It was the police themselves who discovered the sinkhole when a police car passed the place just before 22.30pm, writes the local newspaper Drammen Tidende

.An eyewitness informs local newspaper that the ground just collapsed while the paper's own reporter mentioned that the hole was several meters deep- It looks like a big mud pool and several meters deep.

The lapping in this deep pool, the newspaper said. Emergency services created first major security roadblocks but narrowed later in the evening the size.

Police kept watch at the site until Friday, when a geologist will investigate the ground around the hole.Southern Buskerud Police District Operations leader Trond Egil Groth says to the newspaper VG that Drammen river are very close and that there may be water there which trickles into the hole, but that it is too early to say anything about what has happened.

According to police, there is a well that is 90 meters below ground at the site, and there is also a moraine area. This may have created the hole, said the police.