Washington (CNN) -- A package of gun control proposals including a ban on assault weapons will be un...

Washington (CNN) -- A package of gun control proposals including a ban on assault weapons will be unveiled on Wednesday by President Barack Obama in response to last month's Connecticut school massacre.

Obama and Vice President Joe Biden will announce the proposals, White House spokesman Jay Carney told reporters on Tuesday.

They will be joined by a group of children who wrote letters to the president in the aftermath of the December 14 shooting rampage by a lone gunman who killed 20 students and six adults at a Newtown elementary school, Carney said.

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