A 72-year-old woman has died after being injured at St Boltophs Crescent in Lincoln lived in a quiet residentlal street mainly occupied by other elderly residents.
Officers from Lincolnshire Police are focusing their investigations around a block of maisonettes in the street.
A 38-year-old man is being questioned by police on suspicion of murder.
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It will be a dry morning with some sunny spells. However, cloud will thicken from the west during the afternoon with rain arriving later.
Mostly dry start of the week, although rain arriving in the evening.
Mostly dry overnight with clear spells, although one or two showers are possible.