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The lifeboat was launched on Saturday evening and was out again on Sunday morning looking for the missing teenagers
A lifeboat and helicopter have resumed a search for two teenagers who were last seen in the sea near Lytham St Annes in Lancashire.
The coastguard, RNLI and police were called to reports of three youths in difficulty in the water near St Annes Pier just before 19:00 BST on Saturday.
A third boy, aged 15, managed to swim ashore and was treated for hypothermia.
The 16-year-old boy and a man aged 18, both from Dewsbury in West Yorkshire, are still missing.
Lancashire Police said the searches by HM Coastguard and the RNLI continued well into Saturday night and the force's helicopter would join the search in daylight.
In a statement the force said: "Our thoughts remain with the family and friends of the missing man and boy who are from Dewsbury."
At the scene: Nazia Mogra, BBC North West Tonight reporter
The weather was beautiful yesterday and hundreds of families like mine were enjoying their day out on the beach.
At about 18:00 BST we saw lots of activity outside the RNLI station - people being moved out of the way as crews, ambulances and police cars arrived.
The family, from Yorkshire, was on a day trip, when the three males, aged 15, 16 and 18, went out into the water.
Luckily the 15-year-old managed to swim to safety - the family tell me he is a really good swimmer - but the other two couldn't get out.
When I left at about 23:00 the search was still continuing with a helicopter and two boats out.
So many people were still stood on the promenade, hoping for some good news.
This morning, police have said the search has resumed and the family has told me the 15-year-old boy has hypothermia and is in hospital. He is clearly shocked by what has happened.
My thoughts remain with all of them.
Coastguard rescue teams from Lytham and Fleetwood and the coastguard search and rescue helicopter from Caernarfon attended the scene on Saturday after they received a 999 call just before 18:40, HM Coastguard said.
They were joined by RNLI lifeboats from Lytham St Annes and Blackpool, and independent rescue service Southport Lifeboat, together with Lancashire Police and North West Ambulance Service.
The coastguard helicopter is no longer on site and a police helicopter joined the search on Sunday, HM Coastguard added.
Image caption Crew searched late into the night for the men and resumed their efforts on SundayFollow BBC Yorkshire on Facebook, Twitter and Instagram. Send your story ideas to yorkslincs.news@bbc.co.uk or send video here.
