Soviet authorities have shut down part of a giant nuclear plant after a fire in one of its Chernobyl-type reactors. The official Tass news agency said there were no radiation leaks or injuries after Monday's blaze at the Ignalina plant in Soviet Lithuania on the shore of the Baltic Sea. The plant has been dogged by problems since it went into operation in 1983. Its reactors are similar to those at the Chernobyl plant near Kiev, where the world's worst nuclear accident in April 1986 killed 31 people and sent radiation across Europe.