Ukrainian information security authorities say multiple government websites have come under cyberattacks.

The authorities said on social media on Wednesday that the official websites of the country's foreign ministry and parliament are among those affected.

The authorities say they are distributed denial-of-service, or DDoS, attacks, which send massive amounts of data to a target to crash the system.

The website of Ukraine's defense ministry also suffered a cyberattack on February 16.

A White House official in charge of cybersecurity said the US government suspects that Russia was involved in that incident.