A small fire in the switchboard containing batteries raised alarm at Unit 1-4 in Fukushima Nuclear plant during the early mornging hours on Tuesday, said Tepco authorities.

At approximately 6:38 am on April 12, fire was found at the distribution switchboard containing batteries located in the sampling equipment switchbox situated close to the south water discharge channel for Unit 1-4, Tokyo Electric Power Company said in a statement.

The self defense fire fighting team began putting off the fire while the plant authorities reported to the Futaba fire authorities at 6.45 am, the statement said and confirmed that the fire has been put under control.

There is no impact on the external release of radioactive substances or on the cooling capability of the reactor from this incident. There has been no change on the monitoring figures of the surrounding environment. We will continue monitoring the status of the plant and the surrounding environment around the Power Station. We will investigate the cause in detail, the statement said.