https://www.vice.com/en_us/article/y3d99b/astronauts-report-smoke-alarms-burning-plastic-smell-on-the-iss

Astronauts onboard the International Space Station (ISS) woke up to fire and smoke alarms  triggered by an incident in the Russian Zvezda module early on Thursday. The crew saw smoke and smelled an odor of burnt plastic in Zvezda, which was recharging its batteries at the time, reports the Associated Press.

Though the exact cause of the smoke and odors is not yet clear, the ISS crew restored safe air quality in the station by activating an aggregate filtration system, according to the Russian space agency Roscosmos. The incident is not expected to interfere with ISS activities, including a seven-hour spacewalk scheduled for Thursday, which will be conducted by cosmonauts Oleg Novitskiy and Pyotr Dubrov.