About 14 of them in accidents, car wrecks, etc, about 5 from suicide. A lot of those two sets of death involve guns, about 32k or 4 of the people dead this hour. Of those 4, the majority were suicides. Today, 7000 people will die, 92 of them by guns, and 55 of them will have killed themselves, so somewhere between 30-40 people will have been shot dead today, some others will be killed with knives, poison (more common than people think) and etc.

Your odds as a random citizen today:
1 in 100,000 you will be diagnosed with cancer
1 in 7.5 Million someone will kill you today
1 in 3 Million you will choose to kill yourself
1 in a million that you will die in a car wreck, accidental anything, etc.
1 in 1.5 Billion to be killed by lightning today

And of all of those, the last is closest to paralleling your odds of being involved in one of these spree shootings, mass murders, etc. We've got 2 dead including the shooter and that represents about 30 average minutes of of normal murder/suicide. You're about 1000 times more likely to die driving to work or some place then getting shot by some random maniac while there. Focusing in on these cases like this is not helpful, we probably have more people wreck their cars and die being stressed out or distracted by the news reports of these things then actually die at them.

Every death is a tragedy, doesn't mean they should be part of someone's strategy.