A 17-year-old girl who converted to Islam has been convicted of plotting to bomb a Jewish school in Denmark after trying to contact ISIS.

The teenage jihadist sympathiser, who has not been named, could face life in jail after being accused of planning attacks with bombs made from over-the-counter products.

A court in Holbaek heard that she had written notes about planning to carry out attacks in both her former primary school in Farevejle and in a Jewish school in Copenhagen.

A 17-year-old girl who converted to Islam has been convicted of plotting to bomb a Jewish school in Denmark after trying to contact ISIS (file picture)

She was arrested last year in her home in a village 40 miles west of Copenhagen, aged 15 at the time, after her family alerted the police about suspicious chemical experiments in the basement.

The court said in a statement that investigators a range of chemicals purchased at a Danish cosmetic chain store.

Experts said the ingredients she had gathered to produce the high explosive acetone peroxide (TATP) were not enough to build a dangerous bomb, but the court underlined her criminal intent and motivations in the ruling.

Police who searched the residence found a handwritten note with the words 'Allahu Akbar!' (God is greatest), a date, and the address of the Jewish school in Copenhagen

A court in Holbaek heard that she had written notes about planning to carry out attacks in both her former primary school in Farevejle and in a Jewish school in Copenhagen (file picture)

A second note was marked 'bomb attack on the infidels' and gave the address of her own school near Holbaek, a town west of the capital.

She also wrote about her sympathies to ISIS in her notes and tried to contact its leaders via Twitter.

The Danish girl was convicted today of 'attempting a terrorist act'.

She will receive her final sentence on Thursday, but under Danish law, attempting a 'terror act' can lead to life imprisonment.

In February 2015, a gunman killed two people in shooting attacks at a debating event and a Copenhagen synagogue before being shot dead by police.