Israel has begun intercepting aid ships bound for Gaza in international waters, far from its own shores, according to an Israeli military source cited by army radio on Wednesday, raising legal and humanitarian concerns.

The report did not specify the ⁠number ⁠of vessels involved or their exact location.

Activists aboard the Gaza-bound Global Sumud Flotilla said late Wednesday that it was approached by frigates and warships while its communications were being jammed.

Drones were also flying over the flotilla, they said.

In a post on social media, the aid flotilla said: "The flotilla is under attack: Bianca ship (Italy) is being approached, and most boats are experiencing jamming."