29th, police responded to two other robberies of mountain bicyclers on skyline boulevard near joaquin miller road. march 31st, robbers pulled a gun on a father and son to take their bike. april 6th, wednesday, robbers es frtwo clers ri the bicycling communit there is a fourth gunpoint robbery this week on a group of three bicyclers at the end of 62line boulevard. police have not confirmed the fourth case. >> we made the decision to move our practice location this one. >> reporter: morgan fletcher and fellow volunteers coach 100 middle schoolers had a bicycle in the oakland hills j. we're guiding the children that if someone asks for your bicycle, give them the bicycle. >> reporter: last april, a did a report on a group of robbers targeting bicycle identify thes near grizzly peak. it's uncolor if the group was reported. they report the robbers drive an suv and given the locations, the victims suspect the latest cases are connected j. we like to do night ride see we start to avoid that. >> reporter: man carbon phoner bicycles cost between 5 and $10,000. she said her bicycle was worth less but

29th, they responded to two other robberies of mountain bicyclers on 62 iline boulevard near joaquin millerd. march 31st, robbers pulled a gun on a father and son to take their bike. april 6th, wednesday, robbers took two bikes from two bicyclers riding together. there is a fourth this woke on a group of three bikers at the end of skyline boulevard. police have not confirmed the fourth case. >> we made the decision to move our practice location this week because of this rash of thefts. >> reporter: morgan fletcher and fellow volunteers coach about 100 middle school everiers how to bike the in oakland hills. >> we're guiding the children if someone asks for your bike, give them the bicycle. >> reporter: last april, i did a report on a group of robbers targeting bicyclists near grizzly peak. it's unclear if police arrested the group. the victims in the latest cases report the robbers driving the suv's and given the locations, the victims suspect the latest cases are connected judge we like to do noet drives and avoid that. >> reporter: many cost between 5 and $10,000 she said her bicycle was