The singer posted a video of the track, Looking for America, on Instagram, just hours after writing it.

As her producer Jack Antonoff plays guitar, Del Rey softly sings: "I'm still looking for my own version of America."

"One without the guns, the flag can freely fly. No bombs in the sky, only fireworks and you and I," she goes on.

The shootings in Texas and Ohio left 31 people dead over the weekend.

"I know I'm not a politician and I'm not trying to be so excuse me for having an opinion," said Del Rey in her Instagram caption.

"But in light of all of the mass shootings and the back to back shootings in the last couple of days... I just wanted to post this video."

Del Rey is not the only musician to address the attacks, and criticise politicians' lack of action on gun control, in recent days.

"Imagine a world where it's easier to get an AK-47 than a Visa," tweeted Rihanna, while country star Kacey Musgraves called on her fans to "hold your politicians [and] the president accountable".

"For a man who clearly loves being well-liked, it's indescribably mind-numbing to see him blatantly and murderously ignore doing one thing that would not only make people happy but would save people's lives," she wrote.

Blink-182 postponed a planned concert in El Paso, Texas, on Sunday in "solidarity with the community".

Other stars who have spoken out against America's gun control laws included Cardi B, Chuck D, John Legend and Billy Ray Cyrus.

President Trump condemned the shootings on Monday, saying: "In one voice, our nation must condemn racism, bigotry and white supremacy.

"These sinister ideologies must be defeated. Hate has no place in America."

But he did not voice support for gun control measures proposed in Congress, instead calling for mental health gun control reforms and the death penalty for those who commit mass murder.

"Mental illness and hate pull the trigger, not the gun," Mr Trump said.