PICO RIVERA – No other students will be punished for an incident last week in which an American flag was hung upside down on a school flag pole during a pro-immigration protest, officials said Monday. “To the best of our knowledge, there are no other students that have been identified as being from El Rancho High School,” said El Rancho Unified School District Superintendent Norbert Genis. The district has wrapped up its investigation into last Monday’s incident, which occurred in front of Montebello High School but involved an El Rancho High student, Genis said. Last week, district officials announced that one unnamed El Rancho High student was disciplined for hanging the American flag upside down at Montebello High. However, officials refused to say how the student was disciplined. However, a photo image of upturned American flag, which appeared in the Whittier Daily News, sparked an uproar. On Monday, Genis said the lone student involved has admitted to the incident. [email protected] (562) 698-0955, Ext. 3051160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREOregon Ducks football players get stuck on Disney ride during Rose Bowl eventOn Monday, Genis said the boy is expected to send a letter of apology to Montebello school officials. “As far as this incident is concerned, if we had identified other students as being involved in this, we would have brought them into the investigation as well,” Genis said. The incident occurred when about 1,000 students from the neighboring El Rancho Unified and Whittier Union High school districts descended on Montebello High during student walkouts protesting immigration reform legislation being debated in Congress. Montebello High officials said the protesters took over the school’s flag pole. They removed the California state flag, hung a Mexican flag and then hung an American flag below it, upside down. Montebello Unified School District officials said no Montebello High students were involved in the flag incident as the school was on lock-down at the time, and Montebello High students were being kept inside the campus.