LONDON (AP) — The teenager accused of killing three girls and wounding 10 others in a stabbing attack at a Taylor Swift-themed dance class appeared in court Wednesday and faces new charges of possession of lethal poison and a terrorism charge. Al Qaeda guide.

Axel Rudakubana, 18, refused to speak when he briefly appeared at Westminster Magistrates’ Court via video link from prison for the hearing.

Rudakubana too He is accused of killing three girls Merseyside Police said he was accused of stabbing a further 10 people on July 29 and of producing the poisonous ricin found during a search of his home on Tuesday. Police also found a document on his computer containing an Al Qaeda training manual titled “Military Studies in the Jihad Against Oppressors.”

Ricin is derived from the castor plant and is one of the world’s deadliest toxins. There is no known vaccine or antidote and it kills cells by preventing them from making proteins.

Rudakubana was accused of stabbings in the Southport area in August, which police stressed on Tuesday were not classed as a “terrorist incident” because the motive was not yet known. Police laid new charges on Tuesday, including producing poison and possessing a terrorism manual.

The stabbing occurred during the first week of summer vacation as nearly two dozen teenage girls danced to Swift’s music at Hart Space, a community center that hosts everything from pregnancy workshops to women’s boot camps.

Rudakubana was charged with three counts of murder in the deaths of 9-year-old Alice Dasilva Aguiar, 7-year-old Elsie Dot Stancombe and 6-year-old Bebe King in the seaside town of Southport in northwestern England.

He is also charged with 10 counts of attempted murder of eight children and two adults who were seriously injured. Leanne Lucas, who ran the class, and John Hayes, who worked at a nearby business and rushed to help, were credited by police for trying to protect the children.

The stabbings sparked social media outrage from far-right activists against immigrants and Muslims ill-defined The suspect, whose name was not disclosed at the time, was said to be an asylum seeker who had recently arrived in Britain by boat.

A few hours after a community vigil to mourn the Southport victims, an unruly mob attacked a mosque near the dance studio, throwing bricks and beer bottles at law enforcement and setting fire to a police van.

Riots spread across England and Northern Ireland it took a week. More than 1,200 people were arrested and hundreds imprisoned for the disorder.

Police later said in a statement that Rudakubana was born in Wales to Rwandan parents. British media reported that he was raised as a Christian.