Police have said the emails sent to schools in Bridlington is a 'non-credible threat'.
DCI Stuart Miller of Humberside Police said: “We’ve been made aware of a hoax email sent to schools in the force area this morning.
“We want to categorically reassure parents and children, staff and the wider public that this a non-credible threat that has been sent nationwide.
“Our primary concern is to ensure that schools are given guidance, up-to-date information and reassurance and above all that everyone is safe.
“Community officers have already been sent to schools to provide that reassurance.
Bay Primary School is closed today, with parents being asked to collect their children because of 'the serious nature' of an email it has received this morning.
Headlands School in Bridlington has also received another hoax email - after it was targeted by similar threat on march 19, but it is staying open.
A message has been sent to parents saying 'following police advice, there is no threat to student safety and school will close at normal time'.
The school was one of hundreds targeted by hoaxers last month, when a fake bomb threat was sent.
Despite some reports on social media, East Riding College has confirmed it has not received the emails and is open as usual.
Parents of children at New Pasture Lane have posted a message which does not confirms if the school has been sent an email but says the gates will be locked and children will be kept in a break time and lunchtime.
On the Free Press Facebook page, Donna Walker said: Donna Walker: "The children’s centre has been completely evacuated and the staff have taken them to the college restaurant.
"The nursery staff have been singing the college’s praises as the children were all sat down having toast with jam and bananas. Nice to see community spirit at such a stressful time and the children just thought it was an adventure."
Bridlington School has Tweeted: "Bridlington School is open as normal. We have not received a hoax bomb threat like some other local schools, any concerns please ring the school."