WARSAW, Poland (AP) _ A train hit a tractor pulling a hay-laden trailer over an unguarded crossing in central Poland on Tuesday, killing a couple and three of their children, police said.

A surviving 5-year-old daughter was hospitalized in serious condition after the crash at Owadow near Radom, about 60 miles south of Warsaw, police spokeswoman Grazyna Puchalska said.

The 39-year-old father was driving the tractor, pulling the trailer carrying his 35-year-old wife and four children, aged 4 to 11, when it was hit by a train heading from Radom to Warsaw, police said.

Three of the couple's other children were at home at the time of the crash.