Aubameyang, who hadn't scored in the league since December 16, broke the deadlock in the 50th minute before Bukayo Saka added a second with style in the 61st.

An unmarked Aubameyang wrapped up the scoring in the 77th.

It was a fifth consecutive clean sheet in all competitions for Arsenal and a fourth win in five league matche.

"The spirit is better," manager Mikel Arteta said.

"We have to maintain that run."

But the Gunners only moved up a place to 10th with 27 points, as they try to turn around their season after a woeful start.

Newcastle remained in 15th place, only seven points from the relegation zone.

"There's no denying that confidence is low," manager Steve Bruce said.

"We have to keep plugging away at it."

Aubameyang, who had just three league goals this season coming in to the game, seemed like he would continue his poor run of form after missing a string of chances in the first half before he found his scoring touch.

Arsenal's youngsters also did their part with 20-year-old Emile Smith Rowe providing the assist for Saka, 19, to score.

"We've all played together from a young age," Smith Rowe said of fellow academy product Saka.

"It's a dream for us."

But he's also learning from a veteran player: Alexandre Lacazette.

"He gives me so much confidence," Smith Rowe said.

"As we link up and play together, he talks to me."

Newcastle made eight changes to their team that lost to Sheffield United, with Bruce fielding a more attacking line-up.

The under-pressure manager is under increasing pressure as the Magpies' winless streak extended to nine games in all competitions, but he stressed that he's the man to see them through this tough patch.

"I'm never going to shy away from it," Bruce said.

But the Magpies are still missing one of their main attacking threats, winger Allan Saint-Maximin, who has been sidelined for the past seven weeks with a severe case of COVID-19.

He only recently started training again.

Australian Associated Press