The bodies of three young children have been found after a woman fell to her death at a car park.
The children were discovered at a property in London Road South, Lowestoft, Suffolk and are believed to be infants aged three, two and 11 months.
Police said it is believed the youngsters were the woman's children and are treating their deaths as suspicious.
Suffolk Police said they were led to the address after being called out to the death of the woman who died from head injuries at a car park in Gordon Road.
A force statement said: "An area of Lowestoft was closed off this morning, Monday 15 April, after a woman was found with severe head injuries. It is believed she fell from a car park.
"Inquiries into the incident led police to an address in London Road South, Lowestoft, where the bodies of three children were discovered
The identities of the deceased have not been released.
Detective superintendent John Brocklebank, from Norfolk and Suffolk Major Investigation Team, said: "We are in the early stages of a large investigation into what has happened. It is too early to be able to come up with a definitive explanation and we will be keeping an open mind.
"However from our initial inquiries we do not believe there is any threat to the wider community.
"Our priorities now are to establish the circumstances behind the woman's death and how it may be related to the deaths of the three children.
"Police are appealing for anyone who has information that may help the investigation to contact police on 101."