Air paramedics were scrambled to Looe twice on Saturday, as the busy port enjoyed carnival festivities.
A boy reported to have have fallen from Pen rocks was airlifted to Derriford Hospital by the Devon Air Ambulance at around lunchtime.
Police, Looe RNLI and coastguard rescue teams from Looe and Polruan were all involved in the rescue operation.
The injured boy’s condition is not known.
Then, in the early evening, the Devon Air Ambulance was called for a second time to help a male swimmer who had been found on West Looe Quay 30 minutes after going missing off the Banjo Pier.
Looe RNLI’s D class lifeboat searched the river, and Looe and Polruan Coastguards, together with police officers, searched the beach and quaysides.
Both airlifts were carried out from East Looe beach.