River raiders have struck at houseboats moored in Cambridge - leaving residents feeling "under siege".
A warning has been issued to boaters after the break-ins, which come after a spate of thefts from rowing clubs on the River Cam.
Boaters are now feeling "vulnerable" after the thieves stole two Honda generators worth more than £700 each.
Camboaters, an organisation for river boat residents, has issued a warning after two houseboats moored next to Jesus Green swimming pool were raided over the weekend.
Frank Clarke, who is known as `The Bike Doctor' and whose houseboat is moored next to the lido, said: "A few neighbours have been targeted. It does make you feel more vulnerable. I keep getting stuff stolen out of the panniers of the bike I use to go out on repairs.
"At times like this you do feel under siege. All you can do is batten down the hatches and hope you don't become a target. We do have a special police number to call and a dedicated officer who keeps an eye on things. But when you have a lot of your stuff out on show, as it were, you will be targeted, I suppose."
Thieves took two portable generators and a laptop. The thefts happened between 5pm and 6pm on Monday.
Earlier, a warning was issued after rowers were hit by a £4,000 theft.
Cambridge University women rowers were targeted by thieves who stole vital kit.