BLOOMINGTON - A 24-year-old Bloomington man allegedly threw bricks through two first-floor windows Wednesday morning at The Pantagraph's downtown offices, authorities said.

The man was arrested nearby around 9:15 a.m., shortly after the two bricks came through the windows facing Washington Street, landing near an unoccupied set of cubicles and a small, empty room. An adjacent third window was also damaged, as was the frame of the building's front door at 301 W. Washington St.

No one was injured.

The sound of the breaking glass was heard throughout the building.

Advertising account executive Eric Knowlton followed Pantagraph general manager Barry Winterland outside after hearing the glass break. Winterland said he saw the man outside from his second-floor window after hearing the damage.

They called police and followed the man west on Washington Street, staying about a block behind, until a police officer was flagged down. Police said the man was arrested near Talecris Plasma Resources, 511 W. Washington St.

"(Pantagraph employees) kept police updated, which we really appreciate," said police Sgt. Henry Craft.

Winterland said the man was carrying an open backpack, which police said was empty when he was arrested. Knowlton said the man was acting unusually calm for someone who allegedly just threw bricks through a business' window.

Police performed a successful well-being check on the man last week at the request of his mother, who cited the man's mental health issues, said police spokesman Duane Moss.

A motive is unknown, Moss said, as the man has not talked much with police.

The cost of repairs is estimated at $1,300 to $1,500, Winterland said.

The man was being held later Wednesday at the McLean County jail on a preliminary charge of criminal damage to property.

He could be charged Wednesday afternoon.

The Pantagraph does not name suspects in criminal cases unless they have been formally charged.