The bomb squad has been called after a suspicious item was found on a bus near Melbourne Magistrates Court.

Police conducted safety checks on the bus at the intersection of King and Lonsdale Streets and the surrounding area.

"The bus was evacuated as a precaution," Victoria Police said. 

"The Bomb Response Unit is enroute to the scene. The investigation remains ongoing."

Victoria Poliec have since deemed the area safe.

A heavy police presence also gathered in the area around the intersection as Londsdale Street, between William and Spencer Streets, and also King Street, between Little Collins and Little Bourke streets, were closed.

The road closures has resulted in a spike in traffic in the area as motorists attempt to move around the CBD.

More to come.

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