2 Chainz was robbed at gunpoint in broad daylight Sunday in San Francisco … TMZ has learned … and police say the rapper’s entourage fled “like cockroaches” when it all went down.

A San Francisco PD sergeant tells TMZ … cops responded to a shots-fired call just after 4:30 PM. We’re told when they got to the scene, 2 Chainz wasn’t cooperative … saying he wanted to handle it himself.

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Chainz told police his wallet was stolen and that’s all that happened.

Police reviewed surveillance video … which revealed Chainz was clearly the intended target.

We’re told video also shows Chainz and 14 of his people all “ran away from the incident like “cockroaches running from a flashlight.”

Police are on the hunt.

Source: TMZ