The Latest on a lawsuit alleging Sandy Hook Elementary School officials failed to order a lockdown before 2012 mass shooting (all times local):

5:15 p.m.

A Connecticut appeals court has heard arguments over whether Sandy Hook Elementary School officials were negligent in failing to order a lockdown before a gunman killed 20 first-graders and six educators in 2012.

A lawyer for the parents of two children killed in the massacre told the state Appellate Court on Wednesday that school officials didn’t follow protocols and order a lockdown that may have saved lives when they heard the gunman shoot his way through the school’s locked entrance.

The parents are appealing a lower court ruling that dismissed their lawsuit against the town and its schools.

The town’s lawyer argued officials weren’t certain what they heard was gunfire in the chaotic first seconds and ordering a lockdown was discretionary.

It’s not clear when the Appellate Court will rule.

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6 a.m.

A Connecticut appeals court is set to hear arguments in a lawsuit alleging Sandy Hook Elementary School officials failed to order a lockdown that could have saved lives before a gunman killed 20 first-graders and six educators in 2012.

The hearing before the state Appellate Court is scheduled for Wednesday afternoon.

The parents of two children killed at the Newtown school are appealing the dismissal of their lawsuit by a trial court judge, who ruled school officials were immune from being sued and security protocols were discretionary. The parents are seeking undisclosed damages and hope the case results in safety procedures being followed in the future.

A lawyer for the town and school district has said there is no evidence school officials did anything wrong.

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