KEY WEST - Four heavily armed members of the Cuban Border Guard -- dressed in green fatigues and wearing black boots -- sprinted by boat early Friday to Key West, where they flagged down a police officer near the city's main entertainment strip and were taken into custody.

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When police searched the speedboat, they found two AK-47s and eight fully loaded magazines containing about 240 bullets.

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The unusual landing was the second disturbing security breach in six days that the Coast Guard appears to have missed in the Keys.

On Saturday, five Cuban fishermen in a large state-owned boat bearing Spanish lettering motored right into a piece of U.S. Navy owned property in Key West in broad daylight.