The crimes are alleged to have been committed in Halmstad in April. The man's lawyer said during the detention hearing on Sunday that the suspect denies the crimes, saying he lacked intent to commit them.
The Security Service is investigating the case under the leadership of the National Security Unit.
"It is a sensitive case that is at a sensitive stage. The court has also imposed a prohibition on disclosure on me and everyone else," says Chief Prosecutor Per Lindqvist.
According to the Armed Forces, the man is subject to conscription and is serving at a regiment in the country.
"We are not able to go into further details," the Swedish Armed Forces' press officer Jonas Beltrame-Linné told SVT.
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