Japan on Mar. 15 banned flights within 30 km of the Fukushima No. 1 nuclear power plant following fears of risky leaks of high-level radiation after hydrogen blasts at its two more reactors.

The move, made in line with the Civil Aeronautics Law, excluded aircraft engaged in search and rescue operations.

Early on the day, an explosion occurred at the Fukushima No. 1 plant’s No. 2 reactor, causing a considerable rise in the level of radiation.

According to the plant operator Tokyo Electric Power Co. (TEPCO), the explosion, partly damaged the protection shield of the No.2 reactor, possibly triggered radiation leaks.

Later, fires broke out at the plant’s No. 4 reactor following a blast at the No. 4 reactor building.

The Fukushima No. 1 nuclear power plant is currently in a crisis phase when four of its six reactors fell into trouble and raised high concern after it was hit by the 8.9 magnitude earthquake and tsunami on March 11.

Prime Minister Naoto Kan asked people living within 30 km from the plant to stay indoors while Chief Cabinet Secretary Yukio Edano said the high radiation level detected at 10:22 a.m. after the explosions at the No. 2 and No. 4 reactors ''would certainly have negative effects on the human body.''

Previously, Japan officially asked the IAEA to send experts to help it deal with nuclear crisis caused by the March 11 earthquake and tsunami.

IAEA Director General Yukia Amano said on March 14 that his organisation was discussing the issue in detail.

On March 15, a ministerial meeting of G-8 countries is expected to take place in France to discuss the best assistance forms to be taken for Japan .

The US Nuclear Regulatory Commission (NRC) said it was considering possibilities of helping Japan manage its damaged nuclear power plants after it was requested.

In the meantime, Japan is making all-out efforts to avert catastrophic consequences of the devastating earthquake and tsunami and it has received more pledges for aid.

The Red Cross of China said it would provide an amount of more than 760,000 USD in addition to its previous pledge of 1 million USD to the Red Cross of Japan.

Many relief organisations and businesses in the US have raised more than 22 million USD to aid Japanese victims.

According to the National Police Agency, as by March 15, the devastating earthquake and tsunami claimed the lives of 2,414 people and injured 1,885 others. Up to 3,118 people remained missing in the disasters./.