Police patrol outside the stadium after the team bus of Borussia Dortmund had some windows broken by an explosion some 10km away from the stadium prior to the UEFA Champions League 1st leg quarter-final football match BVB Borussia Dortmund v Monaco in Dortmund, western Germany on April 11, 2017.
Explosion near Dortmund soccer team bus
01:27 - Source: CNN

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Three explosives went off, one failed, authorities say

Defender Marc Bartra in surgery to repair broken bone in arm, team says

CNN  — 

Three explosives that shattered windows and injured a player on the Borussia Dortmund team bus Tuesday as the German football squad was en route to its home Champions League match were part of a targeted attack, police said.

Investigators found near the scene a handwritten letter that claimed responsibility for the attack, prosecutor Sandra Luecke said.

One explosive device failed to go off, Luecke said.

Dortmund police Chief Gregor Lange said police have not ruled out any possible motives for the attack, which led to the match being postponed until Wednesday night.

Marc Bartra of Borussia Dortmund was injured in the blasts, the team says.

Spanish defender Marc Bartra, 26, suffered injuries to an arm and hand, the team said. Bartra, who has played 29 games in all competitions for Dortmund this season, was treated at the scene and hospitalized.

The team later said Bartra was in surgery for a broken radius – a bone in the forearm – and for “bits of debris lodged in his hand.” He will not play Wednesday.

“We hope that he will make a speedy recovery,” Dortmund captain Marcel Schmelzer said on the team website. “The prevailing mood in the Black and Yellow camp seems to be to play the match tomorrow for Marc.”

The team left its hotel about 7 p.m. local time (1 p.m. ET) for the UEFA Champions League quarterfinals match, a Dortmund police spokesman said.

Between 40 and 50 people, including the trainer and medical support staff, were on board the bus. A preliminary investigation indicates the explosives “could have been hidden in a hedge near a parking lot,” according to an update posted on the Dortmund police website.

Head coach Thomas Tuchel, far right, and Borussia Dortmund players stand outside their team bus.

Video from the scene showed police escorting American midfielder Christian Pulisic away from the bus, apparently unharmed. Other images showed head coach Thomas Tuchel and members of the team in training gear, accompanied by police with long guns, standing on the side of the road. Some of the players looked stunned.

“Our task now is to process this because in less than 24 hours we need to play,” Dortmund CEO Hans-Joachim Watzke said, according to a CNN translation. “That’s our job. There is no alternative. It’s an unlucky situation but there is no other solution.”

The location of the blast was roughly 13 kilometers (8 miles) from Westfalenstadion, also known as Signal Iduna Park.

As news of the incident spread inside the stadium, fans of Dortmund’s opponent, AS Monaco, stood, clapped and chanted “Dortmund!”

No one inside was in danger, police said. Security was heavy after the explosions and the stadium was evacuated.

Sport officials condemned the attack.

“I was deeply disturbed by the explosions which occurred tonight in Dortmund. The decision taken to postpone the UEFA Champions League match between Borussia Dortmund and AS Monaco was the correct one since we must always prioritize the safety and security of all fans, team officials and players,” Aleksander Čeferin, president of UEFA, European soccer’s governing body, said in a statement.

Football’s world governing body sent its regards to the wounded player.

“The thoughts of every one of us at FIFA are with the people of Dortmund, and the fans of both Borussia Dortmund and Monaco following today’s troubling events,” said Gianni Infantino, president of FIFA. “We are closely monitoring the condition of BVB’s Marc Bartra, and wish him a speedy recovery from his injuries.”

The match, which will be played at 18:45 CET (12:45 p.m. ET), is the first of a home-and-away series that will send the winner to the semifinals.

CNN’s Nadine Schmidt, Atika Shubert and Sara Mazloumsaki contributed to this report.