A Massachusetts man was charged with attempted arson after a five-gallon plastic canister of gasoline was found near the entrance to a Jewish-sponsored assisted living home that was discussed on white supremacist online platforms, authorities said.

John Michael Rathbun, 36, of Longmeadow was charged in a criminal complaint Wednesday after a 5-gallon container of gasoline was found outside the entrance to Ruth's House, a Jewish-sponsored residential facility on Converse Street, authorities said.

Rathbun was slapped with two counts of attempted arson after DNA from blood stains found on the canister handle and on a charred Christian religious pamphlet that was stuffed into the container's nozzle was linked back to him, the US Attorney's Office District of Massachusetts says.

During the course of an investigation, Rathbun also was found to be the the same person who posted a 'Jew killing day' on a calendar maintained by one of the online platforms, according to federal prosecutors.

John Michael Rathbun, 36, of Longmeadow, Massachusetts, was charged in a criminal complaint Wednesday after a 5-gallon container of gasoline was found outside the entrance to Ruth's House (pictured), a Jewish-sponsored residential facility on Converse Street

FBI agents armed with a search warrant are pictured during a raid of Rathbun's home in Longmeadow on Saturday

FBI investigators set up a blue tent outside of Rathbun's home during the weekend raid

Investigators did not say why the tent was set up outside Rathbun's home during th eraid

Federal investigators are pictured outside of Rathbun's home following a raid on Saturday

Investigators are seen packing items into their vehicles following the raid of Rathbun's home

FBI agents armed with a search warrant raided Rathbun's home on Saturday, prior to his arrest, WBZ reports.

'The charges in this case allege that the defendant tried to blow up a Jewish assisted living residence with a five gallon gas canister, at the same time that the facility was being discussed on white supremacist online platforms,' says US District Attorney Andrew E. Lelling in a released statement.

'We will find, investigate and aggressively prosecute anyone engaged in this kind of mayhem.'

A federal investigation began in March, when authorities say they identified two social media platforms that were operated by a white supremacist organization.

On the platforms, 'users promoted mass killings in the United States and elsewhere directed against religious, racial and ethnic minorities,' prosecutors said.

The users discussed plans to 'engage in these crimes themselves; discussed using various explosive and incendiary devices, including improvised devices commonly known as 'Molotov cocktails'; and identified targets, such as mosques and synagogues,' federal said.

Around March 4, a user on one of the social media platforms mentioned two choices for mass killings, including 'that jew nursing home in longmeadow massachusetts.'

The entrance to Ruth's House, a Jewish-sponsored assisted living care facility in Long Meadow, Massachusetts. A user on a social media platform tied to white supremacists mentioned two choices for mass killings, including 'that jew nursing home in longmeadow massachusetts'

A calendar of events on the other platform had entries in April for a 'jew killing day' and listed a location an unnamed, Jewish 'Nursery Home'.

Authorities say the investigation concluded that the person who made the Long Meadow nursing home reference on the first platform was the same who made the calendar entries on the second.

Rathbun was hit with a charge of 'attempting to maliciously damage or destroy, by means of fire or an explosive, any building, vehicle, or other real or personal property used in interstate or foreign commerce.'

He faces a mandatory minimum sentence of five years and a maximum of 10 years in prison, three years of supervised release and a fine of $250,000, if convicted.

Authorities also charged charged Rathbun with 'attempting to transport or receive explosive devices in interstate or foreign commerce with the knowledge or intent that the device will be used to kill, injure, or intimidate any individual or unlawfully to damage or destroy any building, vehicle, or other real or personal property provided.'

The charge comes with a sentence of up to 10 years in prison, three years of supervised release and a fine of $250,000, upon a conviction.