The Argentine striker, signed on Saturday from French club Nantes for a reported fee of 17 million euros (USD 19.3 million), was flying to Cardiff aboard the plane that disappeared from radars around 20 kilometres (12 miles) north of the island of Guernsey on Monday night.
The former Premier League champions are currently 10th in the table.
The investigating authority added that there was no evidence to suggest that any type of drone was involved in the accident.
Puel said he expected an emotional afternoon.
Leicester City fans fell silent on Saturday in a heartfelt tribute to late owner Vichai Srivaddhanaprabha before the first home match since he was killed in a helicopter crash two weeks ago.
United in sorrow following the death of owner Vichai Srivaddhanaprabha, grief-stricken Leicester will make an emotional return to action at Cardiff on Saturday.
Vichai Srivaddhanaprabha had in 2015 selected the Italian to coach Leicester City, which went on to win the English Premier League in 2016
Fans laid flowers outside Leicester City's King Power stadium on Sunday, a day after a helicopter belonging to the club's Thai owner crashed outside the grounds.
English Premier League club Leicester City has confirmed that their Thai billionaire owner, along with other four people on board, were killed when his helicopter crashed outside a stadium
The AgustaWestland helicopter owned by him crashed shortly after taking off from the Premier League club's stadium on Saturday night following a match against West Ham.
