Wahidullah Mayar, spokesman for the Public Health Ministry, says several people were also injured in the late Saturday explosion inside a residential house in the Afghan capital, AP reported.
Such incidents are common in Afghanistan, especially during the bitterly cold winters.
Last week, a fire that began at a gas station in Kabul, spread overnight to a nearby apartment complex, killing three people and causing much damage. Authorities said 42 suffered burns and other injuries.
A gas-filled tanker parked at the station caught fire, causing the blaze to spread quickly. A police investigation is still under way into that incident.