The U.S. Federal Communications Commission is looking into last week's shutdown of mobile phone services on a San Francisco commuter train line.
The Bay Area Rapid Transit District (BART), which carries close to 350,000 commuters each day, pulled the plug on mobile-phone base stations operating in some of its San Francisco stations last Thursday in an attempt to disrupt a planned protest. The outage lasted about three hours.
The move sparked outrage by civil libertarians who said that BART's actions amounted to an infringement of free speech, and -- because 911 mobile services were also cut -- a threat to public safety.
Now the FCC is taking an interest, a spokesman for the federal agency said Monday.
"Any time communications services are interrupted, we seek to assess the situation," said FCC spokesman Neil Grace in an e-mail. "We are continuing to collect information about BART's actions and will be taking steps to hear from stakeholders about the important issues those actions raised, including protecting public safety and ensuring the availability of communications networks."
Thursday's planned protest did not materialize. It had been planned in response to the July 3 fatal shooting of a knife-wielding passenger by BART police, the second fatal shooting by BART authorities in just over two years.
Over the weekend, hackers who said they were affiliated with the Anonymous hacking collective published the names, e-mail addresses, passwords and other information belonging to more than 2,400 BART riders. The hackers said they stole the information from BART's customer portal, myBART.org.
BART shut down the portal on Sunday and has referred the incident to law enforcement, the subway authority said Sunday.
Anonymous has called for a protest on BART lines at 5 p.m. Pacific time on Monday. BART representatives did not return messages seeking comment Monday.