Veteran forward Dirk Kuyt’s 100th goal for Feyenoord gave them a halftime lead, but Maecky Ngombo equalised for the visitors in the second half.
Feyenoord supporters, angry at a losing streak stretching back to Dec. 20, staged a pre-game demonstration against the club’s management and "several hundred" were detained, the national broadcaster NOS reported.
Ajax Amsterdam's Arek Milik scored his 10th and 11th goals of the season in a 3-0 win over Excelsior.
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Ajax’s victory returns them to within a point of leaders PSV Eindhoven with 10 matches of the season left to play in what has become a two-horse race for the title.
Milik returned to the starting lineup on Sunday as Ajax sought to boost their firepower and the Polish international delivered with two left-footed strikes.
Milik was also involved in the build up for the third goal as Davy Klaassen celebrated his 23rd birthday with a late effort. Utrecht moved up to fourth as Ruud Boymans scored twice to secure a 2-1 win over his former club Willem II Tiburg.
Vincent Vermeij scored twice for second-bottom De Graafschap, who missed out on only their fourth win of the season as they conceded an 84th-minute equaliser to draw 2-2 with Vitesse Arnhem.
Vitesse's Lewis Baker, on loan from Chelsea, grabbed a late leveller when he drove home from 25 metres.
(Reporting by Mark Gleeson; Editing by Toby Davis)
