ISLAMABAD, Pakistan -- With border tension running high in South Asia, nuclear-armed Pakistan test-fired a medium-range surface-to-surface missile Tuesday, its second in less than a week, the official media announced.

The test was a success, according to state-run Pakistan Television, which also carried a statement from President Gen. Pervez Musharraf congratulating the Pakistani scientists who developed the missile.

Details about the missile's range and payload capability were not immediately known.

Nuclear-armed neighbors Pakistan and India each conducted missile tests on Friday.

Pakistan tested a nuclear-capable surface-to-surface missile similar to the one tested Tuesday. That missile had a range of about 510 miles, making it capable of hitting most targets inside India.

Within hours, New Delhi tested its most sophisticated surface-to-air missile, meant to bolster its air defense.