An 7.3 magnitude earthquake struck Japan's east coast Saturday morning, U.S. Geological Survey informed at the same time Japan's emergency agencies raised a tsunami warning for the region.

According to Japan authorities, there were no immediate reports of damage in the region that includes the location of Fukushima's nuclear plant at 170 miles away from the site.

Japan's Meteorological Agency declared a 3-foot tsunami warning for Japan's northeastern coast after the earthquake hit land at 2:10 am Saturday Tokio time.

This week, Japan government has been forced to admit Fukushima nuclear plant cleanup plan is delayed and could result in a new incident.