Police in Dalarna in central Sweden also suspect Eklund of the rape and murder of 31-year-old Pernilla Hellgren eight years ago.
“Eklund is suspected of two counts of murder, aggravated child rape, aggravated rape, child pornography offences and attempted rape,” said the police in a statement.
It is not known where the suspect stands in relation to the accusations against him.
Police said that Eklund would not be interrogated again until the results of a psychiatric evaluation became available in around a month’s time.
Prosecutors are not expected to present formal charges against Eklund until July.