Japan today said there was no immediate end in sight to the crisis at its earthquake-wrecked Fukushima Daichi nuclear power plant. A sudden increase in radioactive iodine levels has been noticed in seawater following reactor leakages around the complex and beyond. Detection of Plutonium in soil at the plant have raised public alarm over the world's worst nuclear accident since Chernobyl in 1986. An earthquake and tsunami on the 11th of this month had left 27,500 people dead or missing and severely damaging the nuclear complex in Japan. France and the United States are assisting Japan in its battle to contain radiation. Japanese Chief Cabinet Secretary Yukio Edano said that they are not in a situation where it can be said that the crisis will be contained by a certain period. Japan's state nuclear safety agency said, new readings showed a spike in radioactive iodine in the sea off the plant to 3,355 times the legal limit, it also added that the people had left the area and fishing had stopped. Pollution of the ocean is a concern. US President Barack Obama spoke to Japanese Premier Naoto Kan over the telephone assuring all help to contain the nuclear crisis.United States is sending radiation-detecting robots to Japan to help explore the reactor cores and spent fuel pools at the stricken nuclear plant. French President Nicolas Sarkozy, who chairs the G20 and G8 blocs of nations, plans to visit Tokyo on Thursday. France has flew in two experts from its state-owned nuclear reactor maker Areva and its CEA nuclear research body to assist Japan in handling the situation.