SANAA, Yemen (AP) — Authorities flooded the streets of Yemen's capital with 2,000 police Wednesday to try to halt six days of Egypt-style demonstrations against the president of 32 years, a key U.S. ally in battling al-Qaida. One person was killed when police and protesters clashed in the southern port of Aden in the first known death during Yemen's political unrest.

The police, including plainclothes officers, fired in the air and blocked thousands of students at Sanaa University from joining thousands of other protesters in the capital of the Arab world's most impoverished nation.

A call spread via Facebook and Twitter urging Yemenis to join a series of "One Million People" rallies on a so-called "Friday of Rage" in all Yemeni cities, seeking the ouster of President Ali Abdullah Saleh.