According to NLEX traffic control center, two lanes were occupied by the bus that caused a heavy traffic. Sen. Richard Gordon, Chairman and Chief Executive Officer of Philippine Red Cross said on a tweet that there are two ambulance units and one rescue vehicle responded the vehicular accident at Valenzuela exit, NLEX at around 7 p.m.
: https://news.mb.com.ph/2019/06/28/six-dead-in-nlex-bus-accident/