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(NECN: Josh Brogadir, Boston) - The guys we spoke with are still shaken up two weeks later.
The targets have all been current Boston University students or recent graduates, especially those carrying backpacks, walking along the street with cell phones.
And police are warning everyone in this area to be careful - at all hours of the day and night.
"This one guy just turns around the front, pulled the gun on us and he said, give me everything you've got," Zac Corradino said.
"He didn't even fake like he had it, just pulled it out, made the cocking sound when you cock a gun, so, it was pretty scary," Andrew Berry said.
Zac Corradino and Andrew Berry, juniors at Boston University, were threatened as they walked along a Brookline Street after class two weeks ago in the middle of the day.
Both were followed by a group of three guys, then held up and robbed, with Zac being more fortunate than Andrew.
"I lost a pen and that was it. Thank God, they patted me down, I took out my wallet and showed them that I had no money. He was like 'Okay whatever, just put it back in your pocket.' The other guys said just pat him down. They patted down the front of me, but my phone was in my back pocket. So I was able to call police as soon as I walked away," Corradino said.
"Not so lucky, they took my backpack which had my laptop, my phone and my wallet," Berry said.
This is video surveillance of three teenagers, appearing to be out for an innocent stroll during the day, but what Brookline police say was anything but - these are the suspects from that mugging.
The guy in the red sweatshirt with new Air Jordans, who has braces, and a black backpack - and his friend in the grey sweatshirt with the number 6 on the front with a purple backpack - are wanted in at least two of four recent armed robberies near Boston University's campus.
All four in the last two and a half weeks.
"One other thing that is a commonality between all these, the handgun gets held at the front of their body at their waist," said Brookline Police Chief Dan O'Leary.
Patrols have increased along Hamilton Road where two students were jumped and robbed at 3 a.m. on Sept. 23.
On Oct. 5 on Thatcher Street, a Boston University graduate became the victim, these three guys the suspects.
Just last night, a female student was held up at 808 Commonwealth Ave as she crossed from Boston into Brookline.
And you already know about the robbery on Sept. 25, because you've met two of the victims.
Neither of whom plans to leave BU and both of whom are shaken by this and hope the suspects are caught soon.
"I've been looking around, kind of checking everybody out, especially at all hours of the day too because it happened at 5pm, so not just at night, all hours of the day," Berry added.
Those guys are lucky, and they did not fight back. No one was hurt in the armed robberies.
BU hosted a meeting tonight for students to discuss the attacks.
And the university has offered a reward of $10,000 leading to the arrest and conviction of any of these suspects.
If you have information and want to remain anonymous, call Crimestoppers at 1-800-494-TIPS.