Indonesia's geological agency has issued a tsunami warning after a quake with a preliminary magnitude of 7.5 struck waters off its eastern coast. It was not immediately clear if the quake caused any injuries or damage. The US Geological Survey said the quake hit early Thursday and was centered 200 miles (327 kilometers) northeast of Manado, a town on Sulawesi island. It says it had a depth of about 20 miles (30 kilometers) beneath the ocean floor. The country's local geological agency said the quake had the power to trigger a tsunami.