The Romanian Football Federation (FRF) has postponed all soccer this weekend following the death of Dinamo Bucharest and Cameroon midfielder Patrick Ekeng on Friday.

Ekeng, 26, collapsed on the field after suffering a suspected heart attack shortly after coming on as a 62nd-minute substitute during a league match against Viitorul Constanta and was pronounced dead two hours after the incident.

The FRF said in a statement on Saturday that all matches in the top three divisions, the junior championship, futsal (indoor football) and women's games that were scheduled to take place between May 7 and 9 were postponed.

The Romanian Cup final between Dinamo and CFR Cluj, which was due to be played on Tuesday, was also postponed until May 17.

Local media said police have begun an investigation into Ekeng's death while hospital officials claimed that he had not received adequate first aid treatment at the ground, which was denied by the club's doctor.

"He was brought to us in cardiopulmonary arrest at the emergency room, in an ambulance, without resuscitation measures as far as we know," doctor Cristian Pandrea of the Floreasca emergency hospital told reporters.

"We started resuscitation measures that lasted approximately one hour and 30 minutes. These measures were, unfortunately, without result."

Ekeng was placed in an ambulance less than three minutes after collapsing and Dinamo's club doctor Liviu Batineanu said he performed cardiac massage.

"The first thing you do is to clear out the air passage and perform cardiac massage," Batineanu said.

On Saturday, Dinamo fans unveiled a huge banner outside the club stadium that read "An empty place in our hearts".

Ekeng, capped twice by Cameroon, had also played for Le Mans in France, as well as Swiss club Lausanne and Spain's Cordoba.

Ekeng joined 18-times Romanian champions Dinamo as a free agent in January and scored his only goal in their 2-2 draw against Steaua Bucharest in the Romanian Cup semi-final's second leg in April.

Cameroon midfielder Marc-Vivien Foe also died after collapsing on the pitch, during a Confederations Cup match in 2003 against Colombia in France.