If you have any information relevant to the ongoing investigation, please call 1-800-494-TIPS. For those looking for loved ones, please call 617-635-4500. Both Google.org and the Red Cross are offering similar services online.
Stories of the day:
- Explosions during Boston Marathon leave at least 100 injured, two dead
- Microsoft working on a smartwatch, says WSJ
- Dish Network attempts $25.5 billion Sprint merger
Today's 90 Seconds on The Verge was written by Bryan Bishop and Ross Miller. All production work is credited to Regina Dellea and John Lagomarsino.