In light of the Colorado theater shooting, U.S. Sen. Barbara Boxer this morning canceled a conference call she was scheduled to have with reporters covering the presidential campaign.

Boxer, a Rancho Mirage Democrat, was supposed to join California Attorney General Kamala Harris on the call. An invitation to the call said they would discuss the contrasts between President Obama and Republican presidential contender Mitt Romney.

The press call was scrapped early this morning following a shooting at a Denver-area movie theater, when a masked gunman opened fire during a midnight showing of the new Batman movie.

According to the latest reports, 12 people were killed and dozens more were injured.

“My thoughts and prayers go out to the families whose loved ones were killed or injured in this senseless tragedy,” Boxer said in a statement issued by her office this morning.

“We hold them in our hearts today and pray that those injured make a full recovery.”

Both Obama and Romney also announced they would not be campaigning today.