The Israeli navy intercepted two boats bound for Gaza on Friday.
The Israeli military said that the boarding was conducted peacefully and without any injuries.
The two boats, one Canadian, the other Irish, carried a total of 27 passengers and reportedly carried medical supplies and letters of solidarity for Gazans.
The boats are being taken to the Israeli port of Ashdod.
According to a statement released by the Israeli military, the order to board came after numerous attempts urging the boats to leave. While they did halt their progress, the boats refused to turn around.
Israeli authorities claimed this attempt to break the Gaza blockade is no more than an effort to embarrass Israel and undermine her security.