London , England ( CNN ) -- A survivor of the fatal Gaza flotilla incident in May headed out Saturday on a new convoy to bring medical supplies to the Palestinian territory . Kevin Ovenden departed London on Saturday morning with about a dozen vans and more than 30 international volunteers as part of the Viva Palestina Lifeline 5 convoy . Two other convoys were being organized at the same time from Casablanca , Morocco , and Doha , Qatar , his group said . The three convoys will aim to meet in Syria before traveling together to Gaza , organizers said . `` Our mission last time was to take aid in and to highlight the siege , '' Ovenden told CNN . `` That 's our mission this time . '' Nine Turkish activists died May 31 when Israeli troops boarded the Mavi Marmara , a flotilla of activists heading to Gaza . Israel has maintained its troops used force on the activists after they were attacked by those onboard , but passengers on the boat insisted they were fired on without provocation . `` I witnessed the man one meter in front of me being shot in the leg , a man 50 centimeters to the back right of me being shot through the abdomen , '' Ovenden said of the experience . `` Neither of them had anything in their hands . There was no Israeli commandos within the immediate proximity . They were shot from above , so it was simply unfeasible -- in that incident I saw -- for anyone to claim they were in fear of their lives when they rang out those shots . '' The incident drew international outrage and badly shook a wide-ranging military and diplomatic alliance between the Jewish state and Turkey , its powerful regional ally . Israel maintains it must inspect all goods entering Gaza so that weapons do not get into the hands of militants . Gaza is run by Hamas , the Palestinian Islamist movement that has said it is dedicated to the destruction of Israel . Unlike the flotilla in May , the convoy aims to enter Gaza by land , through the Rafa border crossing with Egypt , Ovenden said . When the three convoys meet in Syria , they plan to be shipped past the point at which the Mavi Marmara was attacked and down to the Egyptian port of Al Arish before going to Rafah , he said . Organizers said it is the largest convoy set to break the Gaza embargo . CNN 's Eileen Hsieh contributed to this report .
The convoy includes two survivors of the flotilla incident in May 31 . Two other convoys are departing from Gaza and Morocco . Nine Islamist activists died in an aid flotilla to Morocco in May .