LONDON — An alleged supporter of the Islamic State group is on trial in Britain accused of encouraging attacks on 4-year-old Prince George.

Prosecutors said Husnain Rashid, 32, provided an ‘‘e-toolkit for terrorism’’ on an online channel he ran under the name the Lone Mujahid.

Prosecutor Annabel Darlow told a jury Wednesday that Rashid encouraged attacks on a range of targets, including ‘‘injecting poison into supermarket ice creams and targeting Prince George at his first school.’’

Prosecutors said one post included a photo of the prince, his school’s address, a silhouette of a jihadi fighter, and the message ‘‘even the royal family will not be left alone.’’

Rashid denied preparing terrorist acts, encouraging terrorism, and disseminating a terrorist publication.

His trial at London’s Woolwich Crown Court is expected to last six weeks.

associated press