The Carter family gathered for a private funeral over the weekend for [article id="1678313"]Leslie Carter,[/article]
 who died last week of as-yet-undetermined causes at the age of 25.

According to E! News, the funeral took place on Sunday afternoon in Mayville, New York, not far from Leslie's father's house in upstate New York, where she was found dead on January 31. Between 60 and 70 friends and family attended the funeral, including younger brother Aaron Carter.

But conspicuously absent was older sibling Nick Carter of the Backstreet Boys, who reportedly was unable to attend due to performance commitments he had in New York and Pennsylvania over the weekend. The site reported that Nick issued a statement explaining his no-show, saying, "I wanted to be at my sister's funeral, but my family has always had a complicated dynamic ... I love my family. I want to thank everyone for all of their compassion and support that I have received during this most difficult time."

Both Nick and Aaron denied earlier rumors that Nick was not informed of the details of the funeral, with Aaron telling E!, "It was a beautiful service in memory of our sister Leslie. I wish Nick could have been there, but he had other obligations. Anything stating Nick was uninformed of the funeral is untrue."

Though the results of a toxicology test could take several more weeks, an [article id="1678468"]incident report[/article]
 on Leslie Carter's death revealed that she was under the influence of several prescription drugs at the time of her death.

ABC News reported last week that details from the report compiled by officials who responded to the 911 call from Leslie Carter's family reveal that three drugs were found near her body: one to treat symptoms of schizophrenia and bipolar disorder, a muscle relaxant and an anxiety disorder medication.