LONDON — British officials were investigating a cyberattack Saturday on the country’s Parliament after discovering “unauthorized attempts to access parliamentary user accounts.”

A statement from the House of Commons said that as a precaution, remote email access for members has been disabled in order to protect the network from hackers.

“As a result, some Members of Parliament (lawmakers) and staff cannot access their email accounts outside of Westminster,” it said, adding that IT services at Parliament itself are working normally.

An email sent all those affected described a “sustained and determined attack on all parliamentary user accounts in an attempt to identify weak passwords,” according to The Guardian newspaper. “These attempts specifically were trying to gain access to our emails.”

Liberal Democrat Chris Rennard said on Twitter that urgent messages should be sent by text message because parliamentary emails may not work remotely.