Kambala, Uganda (AP) – An explosive device went out of the cinema in a lively part of the capital, wounding a man late on Saturday, a policeman said.
The wounded in the Nairobi explosion is a piston on hand carts and has received a small bag of an unknown person who has escaped, said the officer.
Detectives believe that inside the luggage there is an improvised explosive device that exploded, he said.
The officer spoke on condition of anonymity because he had no right to speak to reporters.
The Kenyan Red Cross said it had sent emergency teams to the place that was sealed by law enforcement officials.
The explosion happened two days after the US embassy in Nairobi issued a security warning that reminded the public of the "continued need for constant vigilance in public places such as shopping malls, hotels and places of worship."
Kenya is recovering from an attack on January 15, when armed armed men invaded a hotel complex and killed 21 people.
The Islamic extremist group al-Shabab, based in neighboring Somalia, took responsibility for the attack on the DusitD2 hotel and shopping complex.
Al-Shabab, who has links with Al-Qaeda, is often targeted against Kenya in response to Kenyan military involvement in Somalia.
Al-Shabab also attacked in 2013 at the nearest Westgate shopping mall in Nairobi, which killed 67 people, and an attack on the Kenyan University of Garrisa in 2015, killing 147 people, mostly students.