SEOUL, South Korea (AP) -- South Korea says it's keeping a close eye on North Korea for any more missile tests.

There's speculation the North might do a long-range test toward the U.S., although South Korea is not saying what kind of missile it thinks Pyongyand (pyuhng-yahng) might fire. The North declared a no-sail zone off its east coast through July 10.

North Korea launched four short-range missiles from its east coast Thursday. The U.S. and Japan called that provocative.

Meanwhile, a North Korean ship that appeared to be heading to Myanmar with what was suspected of being illicit weapons is still heading home after turning around at sea. It was tailed for days by the U.S. Navy.

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