A provincial court judge in Brandon has denied bail for a Rivers, Man., teen accused of planning a school attack.

The 14-year-old, who has been in custody since RCMP arrested him on March 16, made his court appearance via video from the Manitoba Youth Centre in Winnipeg on Tuesday.

He faces charges of conspiracy to commit murder, counselling the offence of murder and two counts of uttering threats. 

Police allege the teen plotted an attack on Rivers Collegiate, a Grade 7-12 school with fewer than 150 students.

Rivers, a community in southwestern Manitoba with fewer than 1,000 residents, is about 40 kilometres northwest of Brandon.

The teen asked Judge Shauna Hewitt-Michta earlier this month to be released and placed in the care of a responsible person.

A provision in the Youth Criminal Justice Act allows for such a release if certain conditions are met and a judge approves.

Hewitt-Michta announced her decision to deny bail after reading from her report for about 25 minutes.

Police allege the boy and a 15-year-old in Bridgewater, N.S., planned to simultaneously attack their schools. The latter was Park View Education Centre in Nova Scotia.

Conversations between two teens started in mid-February, police allege, with a Manitoba teen “actively discussing and planning to harm other students at Rivers Collegiate.”

Interpol and the FBI tipped off Bridgewater police about online communications planning school attacks.

RCMP arrested the Rivers teen on a bus on the way to school. Police searched two properties associated with the boy, seizing electronic devices and two firearms owned by a relative.

Prosecutors say they plan to seek an adult sentence for the youth if he is convicted.

His case is scheduled to return to court on Sept. 15.