Saksi sa Dobol B (transl. Eyewitness on Double B) is a Philippine news broadcasting show by DZBB-AM. Originally hosted by Mike Enriquez, it premiered on February 7, 2000. It is also one of the radio programs of DZBB simulcast on GTV through the program block Dobol B TV and its online livestreaming on YouTube. It is also streaming online on DZBB's Facebook page. Joel Reyes Zobel and Rowena Salvacion currently serve as the anchors.
 The program premiered on February 7, 2000 as a spin-off of Saksi, a television newscast that Enriquez also anchored at the time. It replaced Tapatan with Jay Sonza after its host Jay Sonza transferred to DZRH. This also marked Enriquez's return to radio. The program during 7:00 am to 8:00 am timeslot, was on the break as it was occupied by the newscast, Super Balita sa Umaga Nationwide.
 On February 28, 2011, the program began its simulcast on GMA News TV along with Super Balita sa Umaga Nationwide under the Dobol B sa News TV block upon the christening of the said network. However, the simulcast ended on September 7, 2012, instead News TV aired reruns of Front Row and Reel Time on the timeslot formerly occupied by Dobol B as it would make way for a new morning show Kape at Balita in the following month.
 From 2011 onwards, whenever Enriquez is not available, the news program was anchored by Melo del Prado on the first hour, then del Prado together with Joel Reyes Zobel would anchor Super Balita sa Umaga Nationwide at 7 am. After the newscast, either of del Prado or Reyes Zobel will solo-anchor the program up to 9 am.
 On April 24, 2017, Dobol B sa News TV returned to GMA News TV, marking the news channel's return to simulcast radio on television after its 4-year long hiatus, with Saksi sa Dobol B returning on the said block. The block airs from 6:00 am until 11:00 am.
 Since 2014, at 9am the final hour had featured Arnold Clavio's blind item, Jeng-Jeng, and occasionally, Balitawit. Clavio and Ali Sotto joined Enriquez in Saksi's final hour.
 In 2017, due to Dobol B sa News TV the final hour was started to be branded on television as Sino?, but on radio was still branded as part of Saksi. After this, Dobol A sa Dobol B would start at 10am.
 The third hour segments would often start 30 minutes later (at 9:30), with Dobol A being sometimes pushed to as far as 10:30. This has become a running joke in the show.
 In Enriquez's absence, the Sino? and Jeng-Jeng segments were anchored by Clavio, Sotto and Reyes Zobel. When one of these three were also absent, Susan Enriquez, the host of DZBB's 11am program Easy Easy Lang!, has also substituted for them.
 Also in Enriquez's absence, Dobol A sa Dobol B  began at 9:00 am, an hour earlier, instead of being branded as the third hour of Saksi. This was because prior to Dobol A's return in 2014, most of the segments that aired on the final hour of Saksi were mainly part of Dobol A.
 Following the revamp of Dobol B sa News TV block, Saksi's airtime has officially been reduced to only one hour On June 3, 2019, but the presenters and segments that occupied the affected hours remained the same. Mike Enriquez returned to hosting the radio show after being on medical leave since August 2018 (Enriquez only anchored Super Balita sa Umaga Nationwide and 24 Oras since November of the same year). Melo del Prado, who served as substitute anchor in Saksi, has started hosting his own program Melo del Prado sa Super Radyo DZBB on the 6:00am timeslot, while the 9:00am half-hour timeslot was filled by a new show Ano'ng Say N'yo? hosted by Joel Reyes-Zobel.
 On February 22, 2021, as part of the rebranding of GMA News TV to GTV, the program continues to air to the newly rebranded Dobol B TV programming block.
 Enriquez would return to the show before the 2022 Philippine elections, though he would disappear again a few months after. Joel Reyes Zobel and Rowena Salvacion were the most frequent substitute hosts during Enriquez's absence. Enriquez died on August 29, 2023, at the age of 71.
 On January 16, 2023, the program began its simulcast on GMA Network's newest digital channel, Pinoy Hits.