A "massive bang" which rocked South Yorkshire this morning has left residents puzzled.
The huge blast was supposedly heard in the Rotherham and Meadowhall area at around 5.15am - but there have been no reports of fires or explosions in the area.
Twitter user Katrina Smith took to social media to tweet: "Any ideas what the massive bang was at 5.15am today? Rotherham/Meadowhall area."
She added that the blast had woken her and added: "Asleep with ear plugs in! I expected to look out of window & see there'd been an explosion."
It is not the first time South Yorkshire residents have been left puzzled by mysterious explosions.
Last October, residents in Long Sandall, Doncaster were left baffled by a massive late night noise with no obvious signs of what had caused the explosion or evidence of damage.
Andrew Hill said: “I felt the whole house shake and windows were rattling. “I went outside and could see smoke near the rail crossing but there were no obvious signs of what had happened.
“One of my neighbours said he thought his house was going to fall down it was shaking so much.
“No one seems to know what it was.”
And in November 2014, several loud 'mystery bangs' that shook windows baffled people across the country.
Dozens of Twitter users from London to Glasgow claimed to have heard the strange noises, which sounded like fireworks or loud aircraft.
Some suggested it sounded like 'aircraft sonic booms' and pointed to Russian airships that were performing 'routine military exercises' while passing through the English Channel.