Police would not comment on the gender or age of the charged person.
Detective Senior Sergeant John Rae said "enquiries are continuing at a number of sites of interest to ensure that all relevant information is obtained.
"We are continuing to gather evidence to put together a full picture of the events around Ms Solomona's death," Mr Rae said.
Police collected "a number of items relevant to the investigation" during searches yesterday.
A forensic examination continues at the Cass St scene where Ms Solomona lived with some of her family members.
Mr Rae said police hoped to be able to release the scene back to the family today.
Ms Solomona's body was released to her family yesterday and her funeral will be held in Ashburton on Saturday.