Nottinghamshire Police are urging people to remain indoors during one of the biggest religious events for the Muslim community.
Ramadan, which begins on Thursday, April 23, is considered the holiest of months in the Islamic calendar and normally sees Muslims fast by not eating or drinking during daylight hours.
It finishes on Saturday, May 23.
Chief Constable of Nottinghamshire Police Craig Guildford said: "We are in unprecedented times and the current situation has seen the closures of many places of worship, including mosques across the country and across Nottinghamshire.
"I know how important the mosque is for our Muslim community.
"I am pleased to say, in Nottinghamshire, the advice for Muslims to refrain from attending any mosques and to observe their prayers at home has been well received and supported, I thank you for this.
"I realise how significant the month of Ramadan is for Muslims. However, the position remains unchanged. As Ramadan will start this week, I would appeal to our Muslim community to respect the same advice."
Harun Khan, secretary general of the Muslim Council of Britain, added: "The message for this Ramadan is clear: fast and pray at home and share Ramadan digitally. This is the way to help save lives.
"Ramadan is about connecting to God through worship, reflection, compassion and giving back to others.
"We must be sure to celebrate Ramadan in the safest way possible: in our homes."
