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Input: More women came forward Friday to accuse veteran journalist  Mark Halperin  of sexual harassment as the âGame Changeâ author â whose career has taken several hits in the past few days â issued a lengthy and detailed apology.
The complaints from the now roughly 12 women include allegations that  Halperin   52  propositioned them and touched them inappropriately at work.
One of the women said  Halperin  grabbed  her  breasts and three told CNN  he  had pressed  his  erection against their bodies while at the workplace.
Four new accusations reported Friday by CNN include claims that  Halperin  masturbated in front of a woman employee in  his  ABC office and threw another woman against a restaurant wall when she refused  his  kiss and told her sheâd never work in media.
Mika Brzezinski could no longer stay silent on pal Mark Halperin
The alleged sexual harassment is centered around  Halperin âs time at ABC News  where  he  worked as a political analyst in the 1990s.
 Halperin  on Friday denied masturbating in front of anyone and said that some of the accusations about  him  are not true.
But  as  he  did earlier in the week  when the initial five women first detailed their stories to CNN  the veteran journalist apologized profusely in his Friday mea culpa.
âTowards the end of my time at ABC News  I recognized I had a problem. No one had sued me  no one had filed a human resources complaint against me  no colleague had confronted me â  Halperin  wrote in the 5th paragraph of his 10-paragraph statement.
 Mark Halperin  leaves NBC after sexual harassment allegations
 Halperin  said  he  attended weekly counseling sessions for years after leaving ABC to address  his  personal problems.
The alleged sexual harassment is centered around  Halperin âs time at ABC News  where  he  worked as a political analyst in the 1990s. (Frederick M. Brown/Getty Images)
 Mark Halperin  leaves NBC after sexual harassment allegations
One of the new accusers on Friday told CNN she had been a twentysomething news desk assistant at ABC when  Halperin  approached her in the late 1990s.
She asked  Halperin  â a senior and powerful figure at ABC â for career advice and they went to his office at 10 p.m. so he could talk to her  she said.
The woman  who asked to remain anonymous  told CNN that  Halperin  sat behind  his  desk  hidden from below the waist  and appeared to pleasure  himself  as she spoke to  him .

Mark Halperin issues apology as more accusers come forward