The United Nations Secretary-General Kofi Annan yesterday urged all UN member states to agree on a global strategy to outlaw terrorism "in all its forms."

Speaking here on the eve of commemorations of the Madrid train bombings a year ago, Annan said: "It should be clearly stated, by all possible moral and political authorities, that terrorism is unacceptable under any circumstances and in any culture."

A comprehensive strategy against terrorism should include five "Ds": dissuading disaffected groups from choosing terrorism; denying terrorists the means to attack; deterring states from supporting terrorists; developing state capacity to prevent terrorism; defending human rights in the struggle against terrorism.

"We live in one world and the issue of terrorism affects us all," Annan told the ongoing Madrid terrorism conference.

"When the people of Madrid are hit or people in New York are hit, it has an effect on all of us."

The Madrid train bombings on March 11, 2004 -- one of the worstterror attacks ever in Europe -- killed 191 people and injured more than 1,500.