Lacazette fired the Gunners ahead in the eighth minute after poor defending by the home side before new signing Gabriel made it 2-0 in the 49th and Aubameyang put the icing on the cake with a superb shot into the top corner.
Manchester City overcame a spirited Bournemouth side 3-1 on Saturday to maintain their unbeaten streak and extend their lead at the top of the English Premier League to five points.
Summary of the Europa League semi-final matches played on Thursday.
IMAGES from the EPL matches played on Wednesday
Manchester United defender Cameron Borthwick-Jackson has joined Wolves on a season-long loan, the Premier League club confirmed on Twitter.
West Ham's on-loan striker Andy Carroll has been ruled out for up to six weeks with a hamstring injury, delivering a setback to the Premier League new boys as well as the England team.
Leicester City striker Jamie Vardy has been charged with improper conduct following his sending off against West Ham United in their 2-2 Premier League draw at the weekend, the Football Association said on Monday.
Chelsea manager Jose Mourinho was banished from the dugout and midfielder Nemanja Matic was sent off the pitch as the Premier League champions lost 2-1 at West Ham United who climbed to second in the table on Saturday.
IMAGES from the English Premier League matches played on Sunday.
A stunning late strike from red-hot Tottenham Hotspur winger Gareth Bale lifted the Londoners to a 3-2 win over West Ham United on Monday that took them up to third in the Premier League table.
Manchester City take on Chelsea and champions Manchester United meet West Ham United in the key fixtures of Saturday's programme in the English Premier League.
United have struggled this season, collecting 10 points from their opening seven Premier League matches and being dumped out of the League Cup by second-tier Derby County.
Liverpool have extended captain Jordan Henderson's contract, the Premier League side said on Tuesday, putting an end to speculation over his future at the Merseyside club.
Third-placed Aston Villa are the surprise package of the season and Unai Emery's side face relegation-threatened Burnley while fifth-placed Spurs host a resurgent Bournemouth who have 19 points from their last seven games.
Preview and timings of the Premier League matches this weekend
Arsenal's bid to win the FA Cup for a third successive year ended on Sunday when they lost 2-1 at home to Watford in a pulsating quarter-final tie.
Manchester United striker Wayne Rooney has been charged with using foul language while celebrating a goal in Saturday's 4-2 win at West Ham United, the Football Association said in a statement on Monday.
IMAGES from the English Premier League matches played on Saturday.
Images from the English Premier League matches played on Saturday.
Sunderland became the first top-flight club in more than 100 years to fail to register a win in any of their first nine league games in two successive seasons when they suffered a 1-0 defeat by West Ham United on Saturday.
Manchester United's current malaise was laid bare as they struggled past third-tier Rochdale 5-3 on penalties after a 1-1 draw in the League Cup third round.
IMAGES from the English Premier League matches played on Saturday
A summary of Saturday's action in the Premier League.
Craig Gardner struck the winner as Birmingham City set up a League Cup final against Arsenal after coming from behind to beat West Ham United 4-3 on aggregate on Wednesday.
Leicester City striker Jamie Vardy will miss the Premier League leaders' visit to Manchester United on Sunday after being banned for an additional game for improper conduct, the BBC reported.
Chelsea reached the League Cup quarter-finals thanks to two own goals in a 3-2 win over second-tier Derby County on Wednesday as Frank Lampard's return to his former club ended in disappointment.
Images from Saturday's action in the Premier League.
The squad and Tite will gather on Nov. 14 at Juventus' training facilities in Turin, where Brazil will hold a five-day training camp before flying to Doha on Nov. 19.
An early penalty by Alexis Mac Allister and a Darwin Nunez brace helped Liverpool to thrash Sparta Prague 5-1.
Chelsea manager Jose Mourinho is unsure if the Premier League champions are over the worst following their poor start to the season, but he said on Friday that a win and two clean sheets in the last week had lifted everyone at the club.
Didier Drogba scored twice to lift Chelsea to a 4-1 victory over West Ham United on Saturday and back to the top of the Premier League while Arsenal shadowed them with a last-gasp victory at Hull City.
Rediff.com brings a preview of the main matches coming up this weekend in the English Premier League.
Images from the English Premier League matches played on Sunday
IMAGES from the English Premier League matches played on Sunday.
Arsenal took the race to the final day last season and are strongly tipped to end Manchester City's dominance this time.
News of all that's transpired on and off the football field.
Chelsea's fiery Spain striker Diego Costa snatched a last-minute goal to secure a 2-1 home win over West Ham United and hand new manager Antonio Conte a winning start to his Premier League career on Monday. The bearded Costa collected a header from new signing Michy Batshuayi and thumped it low beyond West Ham goalkeeper Adrian's outstretched right hand to claim the points.
Real Madrid goalkeeper Keylor Navas says the signing of Belgium keeper Thibaut Courtois has not affected his desire to remain at the triple European champions as he emphatically ruled out leaving the club in order to be assured of first team football.
Hull City, who visit Anfield on Saturday, have displayed superb away form in their first season in the top flight, and offer no guarantee of three points to Rafael Benitez's side.
Arsenal slumped to a last-gasp 2-1 Premier League defeat at relegation-threatened Brighton & Hove Albion on Saturday in a blow to the London club's chances of securing European football next season. Watford's Craig Dawson grabbed a stoppage-time equaliser with an overhead kick to earn his side a 1-1 draw with Leicester City on Saturday and a vital point in their battle for Premier League survival.