Thousands protest as tensions flare in Yemen capital

SANAA - Yemen opposition forces deployed armored vehicles across streets of the capital as tensions flared during large Friday protests, and a UN envoy urged the country to negotiate a solution to avoid a "catastrophe".
Tens of thousands gathered for prayers and protests both for and against President Ali Abdullah Saleh's three-decade rule, but residents said an uneasy calm has gripped Sanaa after heavy fighting outside the capital a day earlier.