Ella Braimer Jones says she is suffering panic attacks and post-traumatic stress after the Bondi Chanukah-by-the-Sea mass shooting that killed 15 people and wounded dozens.Her account, given after she filmed the scene, attended vigils and met detectives, came as police revealed investigators had recovered Islamic State flags, improvised explosives and six firearms after shooting dead Sajid Akram and hospitalising his son Naveed Akram.Australian authorities and foreign agencies are probing the pair's recent travel to the southern Philippines and India while community groups mourn the dead, hold funerals and press for tougher protections and firearms reforms.