KENYAN police have arrested more than 1_000 people and shot dead four armed suspects since the weekend in a crackdown on rising crime in Nairobi, a senior police official said on Tuesday. Five guns, 19 rounds of ammunition and stolen items, including three cars, have been recovered from the suspects during the operation, which began on Sunday. Most of those arrested will be charged in court this week. More than 20 people, including police, criminals and innocent people, have died in clashes between police and armed robbers in Nairobi during the past two months. Such encounters have become common in the Kenyan capital. Last month alone, at least 17 people, including police, criminals and innocent victims caught in the crossfire were killed.