Suspicious cylinders force evacuation of workers, public from St. Louis City Hall

St. Louis Board of Aldermen President Lewis Reed calls out to other members of the board to gather and be given the oath of office in a park across the street from City Hall Tuesday, April 21, 2015, in St. Louis. The swearing in was moved outside after City Hall was evacuated Tuesday when two suspicious cylinders and a bag were found at three entrances to the sprawling government building downtown. (AP Photo/Jeff Roberson) (The Associated Press)

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Members of the St. Louis Board of Aldermen are given the oath of office in a park across the street from City Hall Tuesday, April 21, 2015, in St. Louis. The swearing in was moved outside after City Hall was evacuated Tuesday when two suspicious cylinders and a bag were found at three entrances to the sprawling government building downtown. (AP Photo/Jeff Roberson) (The Associated Press)

People gather in a park across the street from City Hall after it was evacuated Tuesday, April 21, 2015, in St. Louis when two suspicious cylinders and a bag were found at three entrances to the government building downtown. There were no known written or verbal threats, but Police Chief Sam Dotson said the suspicious items were clear evidence of a threat. (AP Photo/Jeff Roberson) (The Associated Press)

ST. LOUIS – St. Louis City Hall has been evacuated after two cylinders and a suspicious bag were found at entrances to the building.

City spokeswoman Maggie Crane says an employee arriving for work around 7:30 a.m. on Tuesday found one of the cylinders and alerted a city marshal. The cylinder was found under an archway at one entrance. A similar cylinder and a bag were found at other entrances.

Crane says there have been no written or verbal threats. The building was evacuated and portions of nearby Market Street, Clark Street and Tucker Boulevard were closed. The police bomb and arson squad and the Fire Department were called in. Several fire trucks are on the scene.

Workers assembled across the street but no other buildings near the area were evacuated.