Chemist arrested in London attacks

LEEDS, England - Authorities arrested an Egyptian chemist who studied in the United States and investigated a possible al-Qaida connection in Pakistan as the search widened for those behind London's suicide bombings, officials said Friday.

Magdy Mahmoud Mustafa el-Nashar, 33, who was arrested in Cairo, denied any role in the attacks, the Egyptian Interior Ministry said in a statement. He was taken into custody after the July 7 transit bombings and was being questioned, it said.

No charges have been filed against him.

Chinese general: U.S. attack could prompt nuclear action from China

BEIJING - A Chinese general said Beijing might respond with nuclear weapons if the United States attacked China in a conflict over Taiwan, news reports said Friday.

The State Department rejected the warning as ''highly irresponsible.''

Maj. Gen. Zhu Chenghu, a dean at China's National Defense University, stressed he was expressing a personal view, not official policy, and was confident that China and the United States would not go to war, the reports said.

Mideast truce unravels in a day of violence

GAZA CITY, Gaza Strip - A Mideast truce was in tatters Friday as Israel killed six Hamas militants in back-to-back airstrikes on caves and a van after Palestinian fighters unleashed a deadly barrage of rockets and mortars.

The violence also swept into a Gaza neighborhood, where militants took over after driving Palestinian troops away following a gunbattle that left two teenagers dead and 25 people wounded. It was the worst internal fighting among Palestinians in recent years.

Hamas threatened revenge for the airstrikes, which appeared to signal Israel's resumption of targeted killings of the militant group's leaders - something it agreed not to do when signing the February truce accord.

Explosions target U.S., Iraqi forces; at least 29 dead

BAGHDAD, Iraq - Suicide car bombs and explosions rocked wide areas of the Iraqi capital Friday, targeting U.S. and Iraqi security forces and killing at least 29 people. Two U.S. Marines died in a blast near the Jordanian border.

At least 111 people, including seven American soldiers, were wounded in the bombings - at least seven were suicide attacks.

Three security guards were killed and nine people were wounded in that attack.

- From wire reports