The U.S. Department of State released the revised version of Patterns of Global Terrorism 2003. This publication states that there were 208 acts of international terrorism during 2003, including at least one act of maritime terrorism. On 2 April 2003, in Dravao, the Philippines, a bomb exploded on a crowded passenger wharf. There were 16 killed and 55 wounded. The attack is believed to have been carried out by Indonesian members of the Jemaah Islamiyah, a regional terrorist group with links to al-Qaida.
http://www.state.gov/s/ct/rls/pgtrpt/2003/c12153.htm