By that time I saw 2 young guys came in front to help me. One guy called 911 and another guy found my wallet 10 feet outside of the BART door in the station floor. I told them to call train driver and to keep the train standing there. I called 911 and they asked me about the description of the robbers. Sufficient to say, despite keeping the train in halt for half and hour, searching it myself and by police, we couldn't find them any more. When I went to station master's cube, he said he saw several of teenagers ran past out of the station. BART police talked to me and even sent 2 cops outside BART to see if they can suspect anyone. But by that time it was too late. They were gone.
My son, despite scared, didn't move from the seat and saved my iPhone that fell down on my seat and also hid the iPad he was using that time. I guess one lesson I learnt from this is that make your electronic gadget publicly visible in transit. I have had another situation 6/7 years back when I was returning from Salesforce, San Francisco at 1 PM. My laptop bag (the laptop inside) was in my hand and I felt asleep for a few seconds. A group of teenagers were getting down at Bay Fair station and one of them grabbed the laptop bag without me knowing. After few seconds when I woke up, I saw I dont have my bag in hand and I quickly found them walking in front of me just outside of the door. I straight away walked to them and snatched back my laptop bag from the guy. They gave a red eye to me but didn't dare to attack.
I have sent an email today asking the police officer whole filed the case with me asking for video footage of the incident. I hope they have been able to capture and identify some of those robbers. Similar incidents have been happening in this area for a while, the most notable one a year back when 40 to 60 teenagers robbed an entire BART train at Oakland. and a man stabbed at Hayward BART station just 3 months back.
Update: I got email response from the police officer. A detective has been assigned to my case who has reviewed the video footage and is working on identifying the suspects.