House Minority Leader Nancy Pelosi, D-Calif., said Saturday that she has received “obscene and sick” calls, voicemails and text messages after a hacker posted the private cell phone numbers and email addresses of roughly 200 current and former congressional Democrats.

“Please be careful not to allow your children or family members to answer your phone or read incoming text messages,” Pelosi wrote in a letter to colleagues. “This morning, I am changing my phone number and I advise you to do so as well.”

The contact information was part of a large computer-content dump Friday and the most recent in a series of cyberattacks on Democratic Party organizations, including the Democratic National Committee, as reported by The Wall Street Journal.

Pelosi said she was flying from Florida to California on Friday when she heard that the information had been posted by the hacker or hackers known as "Guccifer 2.0." 

She also confirmed that the Democratic Congressional Campaign Committee has hired a cybersecurity firm to conduct an investigation of the breach, purportedly part of a Russian cyber-attack that Pelosi has termed “an electronic Watergate break-in.”

Pelosi added that the chief information security officer of the House, in coordination with Capitol Police, has sent communications to those people whose email addresses have been made public about how to address the problem. The chief administrative officer of the House has also sent an email stating that the House computer system has not been compromised, but urged members and staff to be vigilant about opening emails and websites.

The DCCC is also issuing similar guidance.

Rep. Ben Ray Lujan, D-N.M., was also holding a conference call with lawmakers on Saturday evening along with cybersecurity experts who have been investigating and responding to the breach.

"This is a sad course of events, not only for us, but more importantly for our country," Pelosi said in urging lawmakers to join the conference call with Lujan.

Fox News' Rich Edson and the Associated Press contributed to this report.