Nearly a dozen people have been injured after a 5.4-magnitude earthquake struck the Japanese capital of Tokyo.

The epicenter of the tremor, which struck at 5:49 a.m. (2049 GMT) early on Saturday, was located in the Tokyo Bay area, according to the US Geological Survey.

The Japan Meteorological Agency (JMA) also said the quake occurred at about 70 kilometers (some 43 miles) below the sea surface.

An official of the Tokyo Fire Department said 11 people were lightly injured in the quake. No tsunami warning had been issued.

Residents said the quake shook buildings, with local media reporting that at least five people were temporarily trapped in elevators across the capital. The jolt briefly stopped Tokyo subways and trains.

The JMA also warned millions of Japanese that sizable aftershocks could jolt Tokyo at least in the next few days.

Japan is one of the world’s most earthquake-prone countries.

On March 11, 2011, Japan was struck by a magnitude 9 earthquake, followed by a devastating tsunami that ravaged the country’s northeastern coast. The natural disaster led to the death of some 16,000 people.

The Saturday earthquake comes as residents of Tokyo have also been warned to stay vigilant against possible landslides in the wake of heavy rain that hit the region earlier this week. The massive flooding has killed at least three people.

Thousands of rescuers are searching for almost two dozen people still missing in disaster-struck Joso city, which lies about 60 kilometers (37 miles) outside Tokyo.

The chief forecaster at the JMA Takuya Deshimaru, said that the rainfall was “unprecedented” for that part of Japan, adding, “We can say this is an abnormal situation and there is imminent serious danger.”

More than 90,000 people were forced to abandon their homes due to widespread flooding and landslides in northeast Japan.