New Delhi, May 1 -- Israeli forces near the southern Greek island of Crete intercepted more than 20 boats from a flotilla of several dozen seeking to break Israel's naval blockade of Gaza and planned to transport about 175 detained activists to Greece on Thursday, Israeli authorities said.

Activists aboard the Global Sumud Flotilla said Israeli forces stormed their vessels overnight, smashing engines and detaining some of those onboard while they were sailing in international waters near Greece, hundreds of miles (kilometers) from Gaza and Israel.

Israel officials said they needed to take early action against the flotilla before it reached Israeli waters because of the high number of boats involved.

The flotilla set sail earlier this m...