Right-wing political activist Pamela Geller organised the controversial event in Dallas. Gunmen opened fire at security guarding the venue and were shot dead by police, in an attack later claimed by the extremist militant group.
A message purportedly released by Isis claims the group has “71 trained soldiers” stationed across 15 states in the US "ready at our word to attack any target we desire".
"The attack by the Islamic State (Isis) in America is only the beginning of our efforts to establish a wiliyah [authority] in the heart of our enemy,” the message said.
"Our aim was the khanzeer [pig] Pamela Geller and to show that we don't care what land she hides in or what sky shields her; we will send all our Lions to achieve her slaughter.
"To those who protect her: this will be your only warning of housing this woman and her circus show.
Texas shooting in pictures
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"Everyone who houses her events, gives her a platform to spill her filth are legitimate targets. […]The next six months will be interesting.”
NYPD spokesman Stephen Davis told the Associated Press that investigators from counterterrorism and intelligence bureaus had met with Geller and will lead a "comprehensive threat assessment" to asses whether she needs a security detail.
Geller, the President of the American Freedom Defence Initiative, remained defiant in the face of the threat, telling AP: "I will continue to speak in defence of freedom until the day I die. It's just that simple. It's not even a choice. It's a calling.
"Cartoons are political critique. It's a cartoon," she added. "Is that what we want to outlaw? We want to outlaw humour? We want to outlaw comedy? If you want to know who rules over you, find out who you cannot criticise." She said she would be wearing a bullet-proof vest at similar events to the Dallas drawing contest.
Geller famously launched a campaign to stop the opening of an Islamic community centre close to the World Trade Centre after the 9/11 terror attacks.
