NEWBURYPORT — A 27-year-old Topsfield man arrested last month after police found a small arsenal, as well as a large pressure cooker, in his home has been ordered to undergo a further mental health evaluation at Bridgewater State Hospital.

Daniel Morley was ordered by a judge to remain at the psychiatric hospital for “further commitment and evaluation,” according to a spokeswoman for Essex District Attorney Jonathan Blodgett.

The judge slated a status hearing for Aug. 15, said spokeswoman Carrie Kimball Monahan.

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Morley, a technician who spent seven years working in the division of comparative medicine at MIT, was arrested last month after allegedly attacking his mother and threatening to blow up an airplane.

Police found the pressure cooker, ball bearings, fertilizer, a shotgun, a pistol, hundreds of rounds of high-caliber ammunition, swords, knives, and anti-Semitic and anti-government literature, according to court records.

Pressure cookers were used by the Boston Marathon bombers to make their homemade devices. Certain types of fertilizer, and ball bearings, can also serve as ingredients for bombs.

“I’m sorry for what I have done . . . and I will have to answer only to God,” he told his mother, according to the court records.

Robert LeBlanc, a Methuen lawyer representing Morley, said earlier this week that his client had suffered a psychotic break from reality after failing to take medications.

LeBlanc said today in the courthouse that he has not yet met with Morley for fear of interrupting his care at the hospital, a medium-security health facility operated by the Department of Correction.

“I don’t want to disrupt the treatment,” LeBlanc said, adding that his primary concern is Morley’s mental health.

LeBlanc called Morley “very smart,” and said that he has a high IQ. LeBlanc also said that he does not expect Morley will appear in court for the trial.