Greenock gas explosion: Streets sealed off at Ocean Terminal
Five fire engines were sent to the scene at Patrick Street after the explosion in a commercial building shortly after 2pm.
Police blocked roads around the terminal.
A Scottish Fire and Rescue Service spokeswoman said: "We were alerted at 2.07pm to reports of an exploding gas cylinder at a commercial unit at Patrick Street, Greenock.
"Operations control mobilised five appliances to the scene where crews remain as they dampen down the single-storey building.
"There are no reported casualties."