A LAWYER in Baltimore has found herself knee-deep in a Twitter war with pro-gun advocates after she witnessed a shooting.

Jennifer Lubinski, using the handle @jslubinski, says she was walking into a courthouse lobby in Delaware when five people were shot.

AFP reports a gunman murdered two women at the court before police shot him dead.

"A lone gunman walked into the lobby area and opened fire. Two civilian females were killed in the shooting," a police spokesman in the town of Wilmington, Delaware, told a televised news conference.

Police officers on duty engaged the shooter and two were wounded before the shootout, involving "multiple" bullets at the New Castle county court building ended.

Ms Lubinski detailed her ordeal on Twitter.

"You don't know what you're going to do when something like this happens. I hid in a corner shaking like a baby," she wrote.

But it was her first Tweet that brought the trolls out in force.

"I just witnessed my first shooting. DE chancery court lobby. Multiple down. Police here. Where's the #NRa asI'm hiding in parking lot?"

Many pro-gun lobbyists fired back at her hard and fast, and within minutes Ms Lubinski was challenging them to keep bringing the heat, tweeting: "Please keep trolling me #NRA. I won't shut up".

She said: "I'm angry at what gun culture is doing to my country."

Her statements provoked responses such as: "I love when Liberals jump on the backs of dead victims and scream at the NRA" from Rick Canton (@rumblindurango), her primary foe in this Twitter battle.

Canton added: "ALTERNATE HEADLINE - Lawyer with an anti-NRA agenda can't help tweeting anti-NRA rhetoric in response to tragedy. "

Plenty of others were involved, too.

@JazonZerbey wrote: "I'm guessing @jslubinski wasn't down with #NRA or Christians before this morning. This looks more like an opportunity than a tragedy to her" and @Joker9353 tweeted: "@jslubinski You do have the right to remain silent. Try it for once".

Ms Lubinski vowed to keep fighting the trolls as she signed off for the night and thanked everyone for their support.

WebTV host, producer and lawyer Lee Pacchia perhaps summed up the whole exercise perfectly.

"The new speed of life is surreal. Lawyer gets shot at in court, live tweets it, gets attacked by #NRA fanboys. All before lunch."

- with AFP