News outlets are reporting that Sen. Lautenberg (D-N.J.) has died from complications of pneumonia. He was 89 years old.

Gov. Christie will fill his seat.

https://twitter.com/AlexYudelson/status/341549648181346304

Condolences pour in on Twitter.

Twitchy will continue to monitor this news and update with further developments.

Our thoughts and prayers are with the senator’s family and loved ones in their time of grief.

Update:

Colleagues are also mourning on Twitter: