ali bauman has more. >> reporter: debris litters the scene along this new york interstate where a bus chartered by the farmingdale high school band landed in a ravine two hours northwest of new york city. >> imagine the fear, the screams, and the aftermath when these high school students, many of them freshmen, were surrounded by there chaos. -- this chaos. >> reporter: the vehicle was part of a six-bus caravan of 300 people heading to a band camp in pennsylvania. dozens of first responders rushed to the scene just after 1:30 p.m., forced to use ladders to rescue victims as the bus teetered among treetops. some of the injured were pulled through windows. crews also scoured the woods to find anyone who may have been ejected. >> there were 44 passengers on the bus. 40 students and four adults. at this time, we have two confirmed fatalities, both adults and serious injuries including five critical. >> reporter: traffic was shut down for hours. tonight officials say it is unclear how the bus careened out of control. the national transportation safety board will send a team here to investi

cbs's ali bauman will start us off tonight from near the scene as we are just learning the preliminaryening, ali, what can you tell us. >> reporter: good evening, norah. the students were supposed to arrive to the camp and green lane, pennsylvania around 2:00 p.m. according to a post to their website. instead the bus somewhere traveling on plunge down the road 40 minutes before making it there. and police say a preliminary investigation shows that failure of a front tire may have contributed to the crash. debris litters the scene along this new york interstate where a bus chartered by the farmingdale high school band landed in a ravine after rolling down an embankment just outside way, -- two hours northwest of new york city. >> but imagine the fear, the screams, and the aftermath, when these high school students many of them freshmen were surrounded by this chaos. >> reporter: the vehicle was a part of a six bus caravan of 300 people headed to a band camp and pennsylvania, dozens of first responders rushed to the scene after 1:30 p.m., forced to use ladders to the rescue victims as th

ali bauman will start us off tonight from near the scene as we are just starting the preliminary causecrash. good evening, what can you tell us? >> good evening, norah. the students were supposed to arrive to that camp around 2:00 p.m. according to a schedule on their website. instead, a bus some of them were traveling on plunged off the road just 40 minutes before making it their and police just revealed that a preliminary cause of the investigation, preliminary cause of the crash could be failure of a front t tire. >> debris litters the scene along this bjork interstate where a bus chartered by the farmingdale high school band landed in their revealing after rolling down an embankment just outside wawayanda, two hours northwest of new york city. >> imagine the fear, the screams, and the aftermath when these high school students, freshmen, were surrounded by this chaos. >> the vehicle was carrying 45 band members and was part of a x plus -- dozens of first responders rushed to the scene just after 1:30 p.m., forced to use ladders to rescue victims as the bus teetered among treetops. s

ali bauman, thank you so much. >>> turning now to the crisis at the southern border. were apprehended in the first 20 days of september. the influx is nearing record levels. and new today, the biden administration says it's sending 800 active duty troops to help. cbs's manuel bojorquez is there and tells us about the dangerous journey which led to the death of two people in the last day, including a 3-year-old boy. >> reporter: near eagle pass, texas hundreds of people continue to cross the rio grande, trying to slip under wire fences, overwhelming city services. but not everybody makes it. two people including a 3-year-old boy have already drowned in the past two days. still, in juarez, mexico we found more are risking those final steps north. like this group from venezuela. using tree limbs as a bridge to get to the other side. sometimes they fall in. and it's been difficult really to watch when they have to handle children, babies, and try to keep them safe, literally handing them over to somebody who plucks them over to the other side. the majority are from venezu