A Maine man was charged Sunday with four counts of breaking and entering at Mayor Martin O'Malley's gubernatorial campaign headquarters, police said.

Jason Yereance, 42, of Boothbay, Maine, was arrested after police responded to a forced entry alarm at about 3:40 a.m. in the Baltimore building where O'Malley's campaign office is located.

Police said no signs of theft were immediately apparent. Rick Abbruzzese, a spokesman for O'Malley's campaign, also said nothing appeared to be missing.

"We've been through the office and nothing appeared to be out of place," said Abbruzzese, who went to the office at about 7:15 a.m. after hearing about the break-in.

O'Malley's campaign office is located in the Canton section of Baltimore in a renovated factory complex.

When the investigating officer arrived, he found the front doors locked, and there was no sign of forced entry, according to police charging documents. The officer then walked inside and went up to the second floor, where he heard a door open. He then saw the defendant walking out of an office, room 203, O'Malley's campaign office.

The officer asked Yereance if he was working. He reportedly responded "no," and the officer arrested him, according to charging documents.

The investigation indicated that Yearence entered the building through a door, made his way up the stairs and walked into the campaign headquarters.

"These doors appeared to have been left unlocked," according to the police statement of probable cause.

Abbruzzese said police told him it appeared Yereance was intoxicated and may have been looking for a bathroom.

"If the man had any ill-intent at all, I trust that the police will find that out," Abbruzzese said.

O'Malley is a Democrat who is running for governor.