ABC NEWS: Anis Amri, a suspect wanted in connection with the Christmas market attack in Berlin, is very likely the assailant, according to German Federal Interior Minister Thomas de Maiziere.
"We can tell you today that there are additional clues that this suspect is, with very high likelihood, the perpetrator," Maiziere told reporters at a press conference Thursday. "Fingerprints in the cab of the truck have been found, and there are also other clues that suggest that [he is the perpetrator]."
Frauke Koehler, a spokeswoman for the German federal prosecutor's office, said Amri's fingerprints were discovered on the steering wheel, on the driver's side door and elsewhere in the cab of the tractor-trailer that was used on Monday to plow into a crowded Christmas market at Breitscheidplatz, a public square in the heart of Berlin. Based on this evidence, prosecutors "assume that Anis Amri was driving the truck" and have issued a warrant for his arrest accordingly, Koehler said at a press conference Thursday.
The Breitscheidplatz attack killed at least 12 people and injured dozens more, including two Americans. Family members confirmed to ABC News that Richard Ramirez of San Benito, Texas, remained in a Berlin hospital Thursday. He is in stable condition after having emergency surgery for injuries sustained in the attack. His partner of 18 years, a German citizen, was killed, family members said.
ABC News affiliate KRGV reported that the other injured American is also from Texas.
A source told ABC News that Amri was known to U.S. intelligence agencies.
German authorities have launched a Europe-wide manhunt for the suspect. According to a wanted notice, Amri, a 24-year-old Tunisian national, went by six different aliases and is considered "violent and armed." Officials are offering a reward of up to 100,000 euros ($105,000) for information leading to his arrest.
German authorities have not said whether Amri is thought to be still in Berlin or Germany.