William Bledsoe, 70, of Ellensburg, Wash., readily concedes that his twin sons have been accused of trying to kill him, but he said he still can't find it in his heart to condemn them.

"Yes, I am the man they tried to kill," Bledsoe told ABCNews.com, referring to the allegations against his 25-year-old twin sons, Caleb and Joshua.

The twin brothers have been arrested and accused of locking their father in his house and then setting it on fire earlier this week, according to the Ellensburg Police Department.

"I want you to remember, I am their dad, I am not their victim," Bledsoe told ABCNews.com.

In an interview with ABC News affiliate KOMO News, Bledsoe took some blame for his sons' actions. "I'm probably not the easiest guy to live with. … I'm not the easiest guy to work with," he said. "My boys are my boys and I'll never abandon them and not support them."

All three worked at the family's roofing business called Bledsoe & Sons Gutters and Sheet Metal in Ellensburg.

On Monday, Sept. 16, calls came in around 1:40 a.m. of a house on fire "with a report of one resident still inside the home, identified later as the 70-year-old homeowner," police said. The man got out of the house before firefighters arrived, police said.

As firefighters battled the blaze, they found an improvised explosive device inside the house, said Kittitas Valley Fire and Rescue Fire Chief John Sinclair, who was the incident commander at the fire.

"It was a propane canister wrapped with multiple shotgun shells," Sinclair told ABCNews.com. "As soon as we found it, I ordered the firefighter crew to evacuate the structure and we proceeded with fighting the fire from the exterior."

William Bledsoe was treated at the scene for smoke inhalation and was transferred to a local hospital, Sinclair said.

Police later arrested the brothers. They are being held on suspicion of first-degree attempted homicide, first-degree arson and possession of improvised explosive devices, according to court documents.

Caleb and Joshua Bledsoe were charged on Wednesday with four counts each - conspiracy to commit murder in the first degree, arson in the first decree, possession and use of an incendiary device, and the use of explosive without a license - chief deputy prosecutor for Kittitas County Paul Sander told ABCNews.com.

They are scheduled to be arraigned on Sept. 30, Sander said.

It was unclear whether the brothers have attorneys.

Dan Schilperoot, a family friend, told KOMO News, "It is not like them at all. They are kind boys, eager to help."

William Bledsoe said he still has a hard time accepting what happened. "I know what they [the court] told me … but I have a hard time believing that," he said.