Arrest made in Dortmund bomb threat

German police have made an arrest after three explosive devices were uncovered outside the stadium of Bundesliga club Borussia Dortmund.

A 25-year-old man was arrested in Cologne on Tuesday after attempting to email anonymous tips to the authorities about planned attacks.

Explosive devices were found and defused in a car park outside the Signal Iduna Park stadium.

Another device was found in the man’s flat, together with chemicals and extensive material on creating explosives.

The man was reportedly intending to blackmail local businesses and had no connection to terrorist groups.

He had previously been detained in 2010 as a suspect in an unresolved extortion attempt.

“The suspect was apparently acting on his own with a criminal motivation. There was no danger to any third parties at any time,” an interior ministry spokesman said.

Dortmund have confirmed that Saturday’s home match against Hannover will go ahead as planned.

“We expect no security threat at all for the upcoming Bundesliga match on Saturday,” Dortmund police spokesman said Michael Stein.

“The visitors are invited to come to Dortmund. They will be safe here.”

The Federal Crime Office launched an investigation in February after the German embassy in Islamabad received an email tip off about possible attacks.