Egypt's interior minister has warned that the country faces "unprecedented challenges" which require a "decisive" response, as he accused the banned Muslim Brotherhood of attempting to incite chaos.
Magdy Abdel-Ghaffar's comments are the latest sign of alarm by president Abdel-Fattah el-Sissi's government over possible unrest as a result of worsening economic conditions.
Mr Abdel-Ghaffar, who is in charge of the police, said the Brotherhood is seeking through "conspiratorial schemes to incite chaos and confusion with the aim of creating scepticism over the ability of the state and its institutions to satisfy popular expectations".
The minister added: "The security forces will not, under any circumstances, tolerate any attempt to repeat the scenes of chaos and sabotage at a time when the country is moving forward with firm steps toward a promising future, God willing."
Mr Abdel-Ghaffar appeared to be alluding to the 2011 popular uprising which toppled long-time ruler Hosni Mubarak.
Egypt's police force largely melted away on the fourth day of the 18-day uprising, when police stations were stormed and thousands of inmates broke out from a number of prisons.
His comments are the latest warning by officials and pro-government media against what they say are calls by the Brotherhood for street demonstrations on November 11 to protest against prices rises and other economic woes.
There has been no reliable evidence that the Brotherhood was specifically behind the call for protests next month, although the group has consistently encouraged anti-government protests by its supporters since senior Brotherhood official Mohammed Morsi, Egypt's first freely elected but divisive president, was ousted in July 2013, by the military, then led by Mr el-Sissi.
The Brotherhood has urged Egyptians to rise up and topple Mr el-Sissi's government, but gives no specific date for the demonstrations it is calling for.
Mr el-Sissi appeared to refer to these planned protests when, in a meeting with government leaders on Saturday, he urged authorities to be on high alert and beef up the defence of vital state installations. The meeting came just hours after a senior Egyptian army officer was gunned down outside his home in an eastern Cairo suburb.
A little-known group with suspected links to the Brotherhood claimed responsibility for the daylight attack.
Mr el-Sissi's government has already shown sensitivity to signs of a popular backlash over the economy. The presidency has issued near-daily statements saying Mr el-Sissi is instructing ministers to ensure the availability of basic staples at affordable prices and to prosecute any merchants found to be hoarding food supplies.
Despite the economic crisis, Mr el-Sissi appears to enjoy considerable public backing, though it has shown some erosion since 2014 when he was hailed as a national saviour.
The Egypt-based polling agency Baseera said 68% of poll respondents approve of his performance, down from 79% in April and 85% in November.
The perceived fears of a popular backlash over the economy come as shortages and rising food prices are feeding discontent among Egyptians, who are also enduring new taxes and a hike in utility bills.
The government must also introduce a package of economic reforms, including the devaluation of the pound and lifting fuel subsidies, to secure a 12 billion dollar (£10 billion) loan from the International Monetary Fund to bail out Egypt's ailing economy.
Egypt is suffering an acute foreign currency shortage because of the decimation of its lucrative tourism industry, a fall in Suez Canal revenues and reduced remittances from Egyptian expatriates.
It also suffers from double digit rates of inflation and unemployment.
The economic crisis comes as Egypt's security forces are battling an Islamic militant insurgency in the Sinai Peninsula.