Shelvey has been hugely influential in recent weeks as Newcastle have put together a four-game unbeaten run - indeed, Manchester City's double over them represents their only reverses in their last 10 - to boost their survival hopes.
Mahrez's goal was his first since he ended his January transfer deadline standoff on February 10 after being denied a move to Manchester City.
For Newcastle, with just one win in their last seven matches, survival is still the aim with the Magpies just two points above the relegation zone.
Florian Lejeune's ambitious long-range free-kick posed no problems for Loris Karius, Martin Dubravka showing sharp reflexes to keep out a Dejan Lovren header at the other end.
Mohamed Salah again the difference for Liverpool, who finally broke down a stubborn Newcastle side who had threatened to frustrate the free-scoring Reds.
A ricochet in midfield fell to Oxlade-Chamberlain, who fed Salah for the Egypt worldwide to take a sharp touch out of his feet and hit a crisp finish through the legs of Dubravka.
No player within the big five European leagues has scored in more competitive club games than Mo Salah (26 games) this season. The way you do things is really important and after, you have to win. Roberto Firmino drives forward and slips the ball inside for Mane, who slots into the corner.
Salah has had a stunning first season at Liverpool since arriving from Serie A giants Roma last summer.
Ki, who has now scored twice in his last three league games, struck from the edge of the box in the eighth minute and then later sent a corner to an unmarked Mike van der Hoorn in the centre of the box for the hosts' second.
Kaala teaser: Rajinikanth gives his fan a flawless Holi gift
Apart from Rajinikanth's screen presence, another takeaway from Kaala teaser is the brilliant BG score by Santhosh Narayanan. Kaala happens to be the leader of a slum in Mumbai while Nana Patekar is the Marathi politician anxious about his presence.
U.S. threatens action against Iran after Russia UN veto
Haley stated, "Russia has repeatedly stopped the Security Council from acting against the barbaric Assad regime in Syria". And yet, Russian Federation still vetoed the condemnation, as they were reportedly skeptical of the experts' conclusions.
USGS: M7.5 quake hits Papua New Guinea
The quake hit early on Monday morning in a central region of the country's main island of New Guinea at a depth of 35 kilometres. At this stage there have been no fatalities reported in the township of around 50,000 people, however Don Blakeman from the U.S.