An investigation into Austin bomber Mark Conditt has reportedly uncovered evidence that he secretly used the gay dating app Grindr despite his blog posts indicating opposition to homosexuality.

Conditt, 23, killed himself with his own bomb after conducting a string of package bombings in March that left two people dead and four injured.

Two of Conditt's roommates reportedly told investigators that he had used the gay dating application Grindr to exchange messages with gay men.

In blog posts written by Conditt about six years ago, he contended that homosexuality is "not natural."

"Just look at the male and female bodies. They are obviously designed to couple. I do not believe it is proper to pass laws stating that homosexuals have 'rights.' What about pedophilia or bestiality?" he wrote in one entry.

Reports have indicated that Conditt had increasingly avoided family and friends just before he went on his bombing spree.

Conditt grew up in a devout Christian family, but is reported to have later declared himself an atheist after he left the family home.

Investigators have ruled out the possibility that the bombings were racially motivated, but Conditt's motives remain a mystery.

The bomber left a 28-minute audio confession just before killing himself, but there was no explanation for his actions. In the recording, he referred to himself as a psychopath and said that he had suffered from mental illness since he was a child. He ended the confession, saying, "I wish I were sorry but I am not," according to Daily Mail.

Officials have been learning all they can about Conditt to help bring closure to the victims, KVUE reported.

Police were able to track down the bomber using cellphone signals, store surveillance videos and witness accounts. Conditt was identified as the man seen in CCTV footage placing two devices in packages in a FedEx office.

Conditt killed himself inside his SUV on March 21 at around 2:00 a.m. near a hotel just outside of Austin after he was surrounded by the police .

"There were indications, that he stated in the video, that he felt like we were getting very close to him," said Police Chief Brian Manley, according to Daily Mail.

During a raid on his home, the police found a "target list" and another list containing additional addresses that were believed to be his future targets, according to Rep. Michael McCaul of Texas, the Republican chairman of the House Homeland Security Committee.