May 31 (UPI) -- Torrential rains over two days caused flash flooding that killed at least 151 people in Mokwa, Nigeria. The death toll is expected to climb in the city that has a population of more than 416,000 and is located 235 miles west of the Nigerian capital of Abuja, the BBC reported Saturday. The flash flooding was Friday. The Niger State Emergency Management Agency initially reported 115 deaths but revised the number to 151 and expects to find more deceased victimsas the flood waters