HOUSTON, June 5 (Xinhua) -- A suspicious letter prompted a temporary evacuation at the city hall of Texas city Wylie Tuesday morning, according to local media reports.
The city hall had been evacuated for two hours after the letter was found at about 8 a.m. local time, about half an hour after surveillance footage showed a man entered the city hall and placed the unmarked letter on a desk in the council chambers and walked out, local newspaper the Dallas Morning News reported.
The man has reportedly had some previous run-ins with the police.
"The subject has expressed anti-government opinions in an aggressive manner and has expressed displeasure toward police and other government officials," according to a release from Wylie police.
The city hall was evacuated and a hazardous materials unit was dispatched to examine the letter, which was later found to be harmless, according to the reports.
The suspect was not identified, and no arrest was made in this case. The contents of the letter were not released, the Dallas Morning News said.