A Palestinian NGO said Sunday it has lost contact with a two-ship flotilla bound for the blockaded Gaza Strip.
"Contacts have been lost with Al-Awda (Return) flotilla," Adham Abu Silmiyya, a spokesman for the National Authority for Breaking the Siege on the Gaza Strip, told Anadolu Agency.
"The Israeli naval forces are likely to have seized the ships," he suggested.
There was no comment from the Israeli navy on the claim.
The spokesman earlier said the two ships had neared Gaza's territorial waters and were expected to reach Gaza shores later Sunday.
The Gaza-bound flotilla had set sail from Norway on May 15 under the slogan "Right to a Just Future for Palestine" as part of a campaign to break an 11-year Israeli siege on the Gaza Strip.
Some 36 activists from 15 countries are on board of the two ships.
By the end of 2016, nearly two million Gazans were depending on international aid in order to survive while nearly half of the families in Gaza lacked access to secure food supplies, according to the UN's Office for the Coordination of Humanitarian Affairs.
Every year for eight years now, the Freedom Flotilla Coalition has been launching a new campaign to challenge the Israeli siege on the Palestinian seaside enclave.
On May 31, 2010, Israeli commandos killed nine Turkish activists in the Mavi Marmara boat convoy in international waters. The convoy, which was part of the Freedom Flotilla Coalition, was headed for Gaza to deliver humanitarian aid. Another activist later succumbed to his injuries.