A Yemeni judge ordered police Saturday to find a radical US-born cleric ''dead or alive'' after the al-Qaida-linked preacher failed to appear at his trial for his role in the killing of foreigners. Yemen is under heavy US pressure to crack down on the country's al-Qaida offshoot after a scheme to send bombs through the mail in packages addressed to the US was thwarted a week ago. The group known as l-Qaida in the Arabian Peninsula claimed responsibility for the plot on Friday. The cleric, Anwar al-Awlaki, was born in New Mexico to Yemeni parents and is one of the most prominent English-language radical clerics. His sermons advocating jihad, or holy war, against the United States have influenced militants involved in several attacks or attempted attacks on US soil. Yemeni officials say he may have blessed the mail bomb plot, while not necessarily taking an active part in it.