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BOULDER, Colo. — Police have arrested a suspect in two violent attacks on Monday and Tuesday, the Boulder Police Department said.

The victim in one of the attacks suffered grave injuries, police said.

Police said a 50-year-old man was attacked near 27th Way and Baseline Road about 10:30 p.m. Monday just off the University of Colorado campus.

The man was taken to a hospital and is expected to recover from his injuries.

A 43-year-old man was attacked at the same location at 2:30 a.m. Tuesday. He was hospitalized and in critical condition Tuesday night, police said.

“Both victims’ injuries were consistent with beatings, although investigators are awaiting more information from medical personnel,” police said in a statement.

Police arrested 56-year-old James Dobson in connection with the attacks. He was booked into the Boulder County Jail. Investigators described him as a transient.

Police said it appears the victims and the suspect knew each other.

Dobson is expected to be charged with second-degree attempted murder, as well as first-, second- and third-degree assault.

Anyone with information about the case is asked to call police at 303-441-3333 or Northern Colorado Crime Stoppers at 1-800-222-8477.