The mother of a missing teenager said that she will stay in Tenerife for “as long as it takes” after a fresh sighting of her son.

Jay Slater flew from Lancashire to the Canary Islands for a music festival when he disappeared after he went to stay with people he met during a night out on Sunday.

During his final call to his friend Lucy Law at 8am local time on Monday, the 19-year-old said his phone had only one per cent battery, he was thirsty and he did not know where he was.

His last location shows the Rural de Teno Park - an area popular among hikers. He has not been seen since and the search and rescue operation is now in its sixth day.

Debbie Duncan, 55, has now revealed that a person has come forward to say that they saw Slater walking down a road with two other men on Monday evening.

Speaking to MailOnline, Duncan said: “He was with two men looking a bit worse for wear, and they were by a church. This guy has come forward and told the police about it and they are looking into it. We don't know if it was Jay for sure, but it's a start.

“They said it was about 6.00pm which is ten hours after he was seen by the lady in the village. But if it was him what was he doing there and who are these two men?

“All I know is that I am going to stay here for as long as it takes, I'm not going home unless it's with Jay. I'm not going anywhere until they find him.”

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The sighting has not been officially confirmed by the investigation.

The last confirmed sighting of Slater was at 8.15am on Monday by Opherlia Medina Hernandez who said that she saw him walking through the village of Masca, 19 miles from the party resort of Playa de las Americas, where the festival NRG took place.

She told The Times: “People don’t get lost here.”

The search and rescue operation is currently scouring a 2,000ft-deep ravine near to where he was last heard from.

Law, the last person who heard from Slater, revealed that in their final call, the 19-year-old revealed that he “cut his leg on a cactus”.

She told Sky News: “The thing I find the most weird about this is the fact that there's nobody that's seen him. And he's not a stupid boy - he's got some nous about him.

“I've seen so many people up here and I've asked every single one if they've seen him - this is what I find weird. If he'd seen somebody, or a car, he would have flagged down the car - he would have said he needed a phone to contact.”

Meanwhile, editor of the Canarian Weekly Chris Elkington told the BBC the terrain at Slater’s last known location was “harsh”.

He said: “It’s a rural park where you get a lot of hiking trails, it’s very mountainous, quite sparse, quite barren. Quite deserty in a lot of ways, with some very deep ravines and valleys.

“It’s certainly somewhere you would not want to be in normal conditions without the correct footwear, particularly without water.”

British Police in Lancashire are said to have made “an offer of support to the Guardia Civil to see if they need any additional resources” in their efforts to find the teenager .

However, the police in Tenerife have reportedly declined the offer and are continuing the efforts themselves.