Two people who scaled a crane at a Melbourne construction site have not been found despite police and firefighters working to locate them.
It is believed the duo scaled a crane at the building site on Collins Street in the city centre about 7am on Sunday, Victoria Police said.
"A search of the building was unable to locate the pair and the investigation remains ongoing into identifying them," a police spokeswoman said.
Trams were stopped between Exhibition and Russell Streets in an effort to find the pair.
Anyone who has any information about the crane climbers has been urged to contact police.
© AAP 2019