Tokyo. A magnitude 6.9 earthquake struck Japan's north-east coast on Thursday, but no tsunami warning was issued, no injuries were immediately reported and authorities said no irregularities had been detected at nuclear facilities.

Japan's government established an emergency response team to gather information on the earthquake in the Tohoku region and said it was prepared to launch disaster relief operations if necessary.

Chief Cabinet Secretary Minoru Kihara told reporters that authorities were closely monitoring the situation following the quake.

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