Two women have been shot dead at a house in St Leonards, East Sussex, police say.
Police responded to reports of a shooting at a property on Bexhill Road shortly before 8pm on Friday night.
A man was arrested around two hours later after reports of a manhunt on social media.
The 35-year-old was taken into custody on suspicion of murder and a gun was seized.
The women, aged 32 and 53, were known to the suspect, police said.
Two other women, including one who is pregnant, were also in the house but were uninjured as officers were able to lead them to safety.
They suffered shock and were taken to hospital.
"Tragically two women aged 32 and 53 have died after being shot and our thoughts are with their family and friends. We are not looking for anyone else in connection with this incident but we are appealing for any witnesses to come forward," Sussex Police detective chief superintendent Jason Tingley said.
Police had told residents to stay in their homes as they responded to the incident, urging them to keep away from the area.
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Twitter users posted pictures and videos of the police operation taking place in the seaside town, with some saying police had urged them to stay inside "for their own safety".
Police say witnesses or anyone with information should contact them online or call 101 quoting Operation Winlot.
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