Explosions injure German soccer player

DORTMUND, Germany — Three explosions went off near the team bus of Borussia Dortmund, one of Germany’s top soccer clubs, as it set off for a Champions League quarterfinal match Tuesday evening. One of Dortmund’s players was injured.

Police said they were working on the assumption that the blasts were directed at the Dortmund team and caused by “serious explosive devices,” which may have been hidden in a hedge near a car park.

The explosions happened as the team was departing its hotel for a match against Monaco. The game was called off shortly before kickoff and rescheduled for Wednesday.

A letter claiming responsibility was found near the site of the blasts, prosecutor Sandra Luecke told a lateevening news conference. She said investigators are examining the authenticity of what was written in the letter, but wouldn’t reveal more about its contents, citing the ongoing investigation.

The case is being investigated as attempted homicide, Ms. Luecke said.

“We had to assume, and assumed right from the start, that this was a targeted attack against the team of Borussia Dortmund,” Dortmund police Chief Gregor Lange. Investigators are not excluding any possible angles in their investigation, while the “concrete background” to the blasts remains unclear, he said.

There were three explosions near the Dortmund bus as the team left the L’Arrivee Hotel and Spa on the outskirts of the western city of Dortmund for the stadium, around 6 miles away, at 7.15 p.m. local time, police said.

A window on the bus was damaged and Spanish defender Marc Bartra was injured. Club spokesman Sascha Fligge said Mr. Bartra was operated on late Tuesday for a broken bone in his right wrist and to remove “foreign objects” from his arm.

Anxiety over terrorism instigated or inspired by the Islamic State group and other extremist groups operating in Europe has risen steadily over the past few years after bloody assaults in France, Belgium, Britain and, most recently, Sweden.

In Germany on Dec. 19, a truck crashed into a Berlin Christmas market, killing 12 people.