The White House offered few details Monday about President Obama’s plans for proposing new ways to curb gun violence, as he pledged in an emotional speech in Newtown, Conn., the night before.

Asked by reporters about what steps Obama intends to take, press secretary Jay Carney repeatedly declined to offer direct answers during his daily briefing.“It's a complex problem that will require a complex solution. No single piece of legislation, no single action will fully address the problem,” Carney said. “So I don't have a specific agenda to announce to you today. I would simply point you to what the president said last night about moving forward in coming weeks. And I would look for him to do that.”

Pressure is mounting on the White House from gun control advocates to champion new gun control legislation and take other measures aimed at preventing the type of mass shooting that claimed the lives of 27 victims in Newtown on Friday. In his speech at a memorial service, Obama pledged to use "whatever power this office holds" to find a solution to preventing future gun violence.

A petition at the White House Web site demanding stronger action has garnered more than 151,000 signatures in four days.

Carney said Obama continues to support re-implementing the assault weapons ban that expired in 2004. But the spokesman said he did not have a timeline for how quickly Obama wants to move on any potential proposals, offering only that the violence at Sandy Hook Elementary School “has clearly shocked the entire nation and has laid bare the necessity of evaluating the various things that we can and must do as a nation to better protect our children.”