An invitation to a peace conference from a Catholic group prompted a scare at US Representative Peter Welch’s office in Burlington after a worker thought the letter looked suspicious. Authorities locked down the building Monday while a hazardous materials team investigated. The incident followed the weekend arrest of a Mississippi man accused of mailing letters containing the poison ricin to President Obama and US Senator Roger Wicker of Mississippi. Police said the letter to Welch did not contain dangerous material. The Burlington Free Press reported that the envelope was sent from the Fatima Center — Servants of Jesus and Mary, in Constable, N.Y.
| Associated Press May 01, 2013
Read it all, now.
Don't miss any of your favorite stories again. Read the stories that matter to you as much as you want, whenever you want when you subscribe to BostonGlobe.com.
Get full access today for just 99¢