Altoona police say they will release more information this evening
In a statement, the Altoona Police Department says its officers were dispatched to a McDonald's at 09:14 local time after receiving reports of a male that matched the description of the suspect in the killing of UnitedHealthcare CEO Brian Thompson.
They then made contact with the man and arrested him on "unrelated charges", police say.
"At this time, the Altoona Police Department is cooperating with local, state, and federal agencies," they say, adding that they will release more information later this evening.
Altoona is about 277 miles (445km) west of New York City, where the shooting took place.
IMAGE SOURCE, CBS
Image caption,
The McDonald's in Altoona, Pennsylvania, where the suspect was caught
An employee called police in Pennsylvania who found the man with a firearm consistent with the murder weapon.
www.bbc.co.uk